I agree with Serge. After all, they are a team of experienced professionals who have been doing this for a while. I believe EE is like a queue system - people come in and people go out. They are constantly monitoring it to determine the number of ITA's they will be issuing each month. This varies on the number of eligible applicants in the pool, total number of ITA's they want to issue, number of people who havent accepted ITA's or declined them in previous rounds, refugee applications, etc.
As we, as applicants, have no access to any of the above information, any number that is quoted here is just a wild guess.. However, it is a fun game to keep us busy until the actual results actually get announced!
Best,
MF