I honestly don't mind this. This is really useful for small creators in not needing to do workarounds for Patreon or Patreon roles and this makes it easier by being baked into Discord itself. I get the worry of stuff being paywalled but since it is entirely set by the server owner/creator, it would be something to take up with them instead. The 10% cut is a bit rough but I know other platforms also take a cut, but I'm not too sure if 10% is high or low. That would be my own biggest concern since it only makes sense if it is comparable or lower than other platforms like Patreon.