Strangely works just fine for me without being logged in (using Chrome ). Patreon is a site whereby creative types get funding or patronage for various projects via user payments.
Usually it is done by either a monthly fee for a level of access to that creator's work or a fee charged per piece of work done.
For example the levels might be : Level one : $10 See all my non nude work (at least 2 per month )
level 2: $20 See all my nude and non nude work
level 3 :$30 all of level 2 plus one commissioned work every six months
Some people charge based on by piece versus a monthly fee. hope thate xplains it some
Also Pedro thanks for putting in the link to FCF