based from what I have read and have experienced mylot pays me every 15th day of the month; if ever I reached my indicated minimum payout before the previous months ends.. Their policy has never changed- I think.
15th of every month is the official date for the previous months earning.
However, myLot is usually early. One time we were paid on 12th, there are some months when payment is made on the 14th, 13th, etc. Payment is never later than 15th though.