I make about $200/month with olodolo.com but it’s not completely passive as I need to manually handle things like disputes and refunds. I’d say maybe 2h/month.
I’ll take this opportunity to plug a (now profitable!) side project of mine: https://olodolo.com allows making AliExpress purchases using crypto. Since AliExpress doesn’t support PayPal this won’t immediately kill me, but the writing might be on the wall.