Regarding payments (Patreon)

I've seen other artist (pro's and on my same level) use this thing on Patreon where you pay the same day you joined every month, it seems like a good thing for Patreons since you woulnd't be paying twice at the same time (When you enter and when the month ends) but i wanted to hear your opinions on this matter, im getting serious regarding this topic because were already 80 Patreons but only 43 appear as "Paying" and the other 37 i don't know, im not complaining, so sorry if i come out as rude or anything, i want to get the best environment for you all and for me.

Im making this post because i want to found a strong and (the most i can) profesional Patreon before my (winter over there in the US) summe vacations finish, since this will probably be my main source of income as i go through collegue, thank you for your attention and leave your thoughts in the comments please, i need to know more about this billing sistem and what do you guys think of it.