Everyone likes easy cash. Adding 50k/yr at the click of a button seems pretty compelling, and consider that the mere existence of alternatives may force Substack to renegotiate contracts woth high profile writers. But even if you ignore this, it's still a nascent space, Substack has not captured all the writers out there, and I think the fee will definitely be part of the package that writers care about.

Substack should try to provide more value, but if it can't, this seems like it will be a problem for them since there is little competitive moat here.