While the power up "tax" may seem off putting, the high APY for powering up will be very attractive. In DEFI, entry fees are normal. Your stake for a high APY, pay a fee, and stake long enough to ROI + profit. The only ones hurt from a entry fee are those that leave quickly. Every person that leaves makes the APY higher for everyone else. Adding a entry fee can raise the APY by a lot. It wouldn't see so, but it really does pack a punch, esp in a bull run where prices are voilatry, and emotions are high. The tax on rewards does not affect powerup rewards, only those that people cash out. Therefore you give more to long term authors (powerup) and less to those that constantly dump. This would net long term authors way more profits than if it wasn't here. So really, we are taking from those that take from the system and giving it back to those that give to the system by not selling.