The cut-off for each draw is adjusted according to the number of applicants to be drawn. If there are that much applicants at that particualar score, IRCC won't keep cut-off below that.
Cut-off is simply adjusted to remove the 'top applicants' (with highest scores). Let's say that IRCC decides that they wish to draw 2500 candidates from the pool, they will simply draw the 2500 people with highest CRS from the pool, no matter where the cut-off goes. Hpwever, if there are so many people at any given score, IRCC can adjust the draw size accordingly.
Consider the last draw. The cut-off was 472. Everyone with a score of 472 or higher should have got an ITA. This means there were only 2,080 active candidates in the pool with CRS points 472 or higher.
If IRCC wants to conduct another draw for let's say another 2,000 applicants and let's consider the cut-off slides down to 465, but there are extra 90 people at this score (the draw size becomes 2,090). If IRCC slides the bar a little above, at 468 and the total ITAs become less than 2000, let's say 1,908 (whatever no. less than what IRCC desires to draw), then IRCC will set the cut-off to 465.
"What if for the next draw, we are 1242351234124 people with the CRS score = 471 and let's say that the minimum score is 460 (for example) with only 2k number of invitations issued."
If there are 1242351234124 people with the CRS score = 471, and if the draw is for 2k, the cut-off would never be 460. The cut-off in this case would be for 'top 2k active profiles' in the pool.
