What makes you say that with certainty? As far as the official wording i read, it said
"Effective immediately, ESDC will no longer process LMOs for occupations in the Food Services Sector.
LMOs will not be processed for occupations classified by the 2002 North American Industrial Classification System (NAICS 2002) in Food Services and Drinking Places (NAICS subsector 722). Specifically, certain occupations related to sales and service and sales and service management as set out in the National Occupational Classification (NOC 2006). Please see this list for further detail.
Employers that have submitted applications and paid the processing fee, but have not yet received an LMO, will be refunded the full processing fee.
Any unused positions on positive LMOs that have been issued to employers for these sectors will be suspended and therefore will no longer be able to be used to obtain a worker permit"
From this last sentence what i could gather was, if one has applied at a CIC embassy and has received a work permit successfully (it is an approval called Letter of introduction - not an actual work permit), while the actual wp is issued at the port of entry, then i am not sure these people will be refused too.
Unless this is clarified some where else too by CIC.
Unused LMO's are those in which employers have already gotten LMO's but not yet named and hired employees. My understanding is that "unused ones are those".
Still if i had been in their shoes, i would try confirming that from CIC by say asking a friend in Canada to call or via emailing CIC directly perhaps.