I would suggest double-checking your system. I'm aware that several of my games have been reposted with trojans and other malware attached in some forums.
As for payment processors, I don't have any control over them, they are handled directly by Itch.io. My upcoming game will (hopefully) be published in Steam in less than a week tho!
Well, I downloaded it from a site I trust a lot. I've always downloaded games from there and my antivirus never gave me any alerts, and they never tried to cause system errors or anything. But I wanted to ask a question: why does the program sometimes use about 2 gigabytes of RAM? I'm using an Asus Expertbook B1 1502 and it has 16 GB of RAM, and sometimes it drops to 200 or 500 MB. I don't know if it's the mod I installed to translate or something like that. I installed Bepinex to force the app to run in Brazilian Portuguese and I also tested Cinematic Unity Explorer on it, but I removed it because it was causing problems since every time I opened it, it left a control panel on top of the screen.