I read the whole conversations in the link you have provided. I saw the part where you said someone called the CIC call center and someone even sent an email to canadian embassy in the US to ask about this concern and they were given an answer that a spouse cannot get an open permit if her/his spouse is a PGWP.
But on the latter part the guy who called the cic call center called again and was able to talked to two agents and they confirmed to him that HE being a PGWP can apply his wife or his wife can apply for opne work permit provided that he already has a job offer work under NOC O,A,B. Though during that time, he didn't provide the documents that he needs to attach and he was currently applying for PGWP. That's the reason it got denied. The guy who called even said in his post that the agents in the call center scares him because of their contradicting advise or knowledge regarding the visa-rules in Canada.
I will quote his original posts:
"...So I called the call center again. It is quite frightening that sometimes the call center agents give contradicting information. Anyway, today I spoke to two agents and they also emailed me a document about skilled workers and CONFIRMED spouses of skilled workers- with a pgwp (and I made them confirm that the Pgwp counts as work permit- can apply for OWP. HOWEVER you (the skilled pgwp holder) needs a detailed offer that shows your skill level from the employer. Your spouse should include this with the application."
"I recently called HRSDC in my area and informed them that their website info on pgwp was inaccurate and could negatively impact future Canadian employers and students (they had outdated info) They were very receptive to my feedback promised to update...will wait to see if/when they do it."
Now there's another member in that thread who experienced the same. He applied for his spouse OWP 2 months back without his job letter and the immigration refused the wife's visa saying "Spouses of PGWPP holders are not eligible for OWP" So he called CIC about 5 times and he was informed that he needs to reapply and this time provide a job letter that shows he is employed as a skilled worker and then his spouse can get an OWP. He talked to an immigration lawyer and suggested to go to the border and apply for the OWP there and to make sure to bring his job letter and all other supporting documents. They were also advised to go to the border during business hours so they can get a knowledgeable immigration officer. I will quote what the member said about being scared for receiving false information from the cic website.
"I am really appalled and frightened by the misinformation/foggy information provided by cic/hrdsc/canadian consulates in regards to this category. I will let you guys know by tonight as to what happened."
They did what their immigration lawyer advised them and will quote what he said:
"Good News! we went to the POE this morning around 10 am and my spouse was granted an Open work permit at the border based on my PGWPP.
She provided the officer:
my WP,
marriage certificate
my employers job letter,
copy of the specific NOC (printed from hrdc website)
letter of support from me
my bank statement
printed out copy of the following page (canadainternational.gc.ca/buffalo/visas/spouses-conjoints.aspx?view=d)
My spouse did not specifically ask if she is getting the work permit based on my PGWPP or my being a skilled worker. But I hope if you do the same you should be able to get the spousal OWP as well. Please note my spouse is from a visa exempt country and so she was able to get the process done at the border.
I wish all of you very good luck and I hope our experience helps you as well!
Have a nice day!"
The Thread starter of the link you have provided also got an approval as a PGWP.
"Just wanted to update that the work permit of my spouse has been approved.
So in short, if you have all the documents and you are in line with what the CIC website states, normally it is how it should be .
Good luck to everyone else."
Prior to the approval of an OWP of the spouse he even said:
"Great news that spouse of PGWP with a job in skill category A, B or C is eligible for open work permit. The majority of rejects I have seen have had the common theme of the husband or wife having an open work permit when the partner was here on a study permit and when the application for pgwp is made, the application of the spouse is rejected."
To sum it all up, what you said about a spouse can't get an OWP if the spouse is PGWP and the spouse should be on CWP is NOT TRUE. As long as their spouses who are PGWP have the job offer and the other proper documents, their partners can get an OWP.
Don't worry I read the link amikety provided and I read from page 1 to 3. I'm no sure if he or she read it all and there's no reason not to know what happened to the incidents of the members who wrote or shared their issues in that thread since the thread amikety provided started on 2011 and as soon as they got an approval of an OWP of their spouses, some of them, especially the thread starter shared it in that thread right away. I had to read the link he/she gave because as what I know too, a spouse can get an OWP if their partner is a PGWP visa holder with a skilled job under NOC O,A,B.
So You are right. You can get an OWP if your husband is a PGWP. As long as your husband or you will attach the proper documents like job offer/his salary in the letter/health benefits if there are/PGWP visa or whatever you need to show that he has a PGWP visa etc. The most important is the job employment letter under NOC O,A,B.
Anyway hope you will get yours soon. Just have faith in God. Good Luck.