Im a pixel artist who sells asset packs on itch.io. I'm relatively small, and many of the packs I have available are set as pay what you want, so I only make a sale maybe every other week on average. Every sale I make absolutely makes my day, and I wish there were some way I could convey that to my customers. Would it be against itch.io's TOS to send an email, thanking people who made a purchase?