Firstly, before November 2016, there was no credit for international students in express entry. After November 2016, international students started receiving credit for the studies they had finished in Canada, so students felt that their studies could get them a residency.
LMIA points have been reduced from 600 to only 50 points, which once again gives a darker side to the people who want to gain residency by fakery and fraud. Earlier they were getting 600 points without any hard work, without any education, and that was a sure shot for their residency.