[defertoreptar]

Part of it may be the mindset of "paying for something = negative" and "getting something = positive." Micropayments maximize the time we spend thinking about the negative part of the transaction. On the other hand, if we wait too long and have a $1000 bill at the end of the year, that may be even more painful than having to think about smaller payments more often. The psychological sweet spot for many things is the once a month subscription.