i think you could work out a nice patreon, actually.
you could have tippers gain advanced access to updates, or beta material, whatever's on your plate that you need direct input on ( like these sprites, for instance )
you could have a regualr build here on itchio, and a " nightly " build for patroen users only, that's how the porn game devs do it ¯\_(ツ)_/¯