I didn't know Getrevin, but it's possibly out of scope for the average Gumroad creator. I mean, they charge $799 per month (according to them, they're competitive if you have a monthly volume of 150K)

There's plenty of MoRs out there: FastSpring, Paddle, Lemonsqueezy, and I'm sure the ones that I don't know will flood Twitter in the next days :-)