i havent been allowed to accept credit card here for a long time, stripe refuses.
If you can, on my patreon you can purchase this and Nexus for $7.50, otherwise steam has it (not on sale atm) you can also join patreon or subscribe star for $5 and download it, updates arnt included that way though, unless you maintain or rejoin again, but the 7.50 purchase unlocks it permanently.