He won't release it this month, so that ppl keep the subscription for next month too. :/
Actually patrons see that kind of actions dishonest, if he really was doing something like that, he would lose many patrons in the long term.
I'm going to put an example, in April 25th Oppai-man released the most recent update of Freshwomen. According to your logic, he should wait one more week to have the patrons subscribed for the next month too. Well, one day prior to the release, April 24th, he had 430 patrons less than L&P, guess what? right now he has 230 patrons more than L&P. What happened? The people who didn't support him the month of the release decided to support him the following one, plus the new players, and he didn't lose the subscribers of the previous month neither.
There's nothing better to earn more patrons than being fast, if someone has the update already done, he should release it instantly, even if it's the end of the month.
Those milking strategies of which many people accuse L&P, are actually non effective to earn more money. If L&P has that amount of patrons, it's because his game is incredible popular, and actually his numbers are very low compared to its popularity. Freshwomen is significantly less popular than AWAM, his dev opened his patreon just one year ago, and still he has already more patrons than L&P. Why? He acts very professional and he already hired 8 people full-time (although he earns a lot through steam too, he is earning a lot more money than L&P).