If most of TL0s are one timers then there is no need to adjust something, I think. But if the main reason is lack of post readings then that should be lower. Perhaps. It depends if those users needs something you offer to TL1s.
I dropped off likes. I don’t see any purposes to count those (mostly because I don’t like idea where rewarding happends only because of pure cilicking, plus my users are using so heavily reactions and only one of those is counted as like)