I consulted with an immigration lawyer and he says Quebec may still accept applications even if you don't meet the required 50 cut off score. They will look at other factors like French, whether your occupation is in high demand in Quebec labour market. Similar to ONIP HCP stream.
Apparently, there is a high labour shortage in Quebec and this EOI was basically launched so the best skilled workers based on Quebec's needs can be invited rather than first come-first serve applicants.
I am not sure how much of this is actually true but just thought sharing this up here