I agree with what quite a few are saying here - always nice to get an extra reward from an appreciative reader, but better if they stayed 'in house' rather than diverting away to a third party that they may then need to sign-up with. Makes more sense to keep their interest on the platform.

It would be smoother if the tip button worked a bit like the clap button and the reader had an option to then tip the writer. The easier it is to do, the more likely it'll happen!