You can buy my work for this month and pay me once. If you would like my newer, additional work, you’ll have to pay me again. Incidentally, because I’m nice I’l

You can buy my work for this month and pay me once. If you would like my newer, additional work, you’ll have to pay me again. Incidentally, because I’m nice I’ll let you keep the work I already did for you without charging you again for it. I think in this case it depends on perspective to describe whether or not something is a scam.