Smaller chains have less economic security and less integrations, so it makes sense if they are expecting large donations to use something well established that

Smaller chains have less economic security and less integrations, so it makes sense if they are expecting large donations to use something well established that is very unlikely to suffer a reorg attack and that is easily accepted worldwide. And as others have said, 1 nft makes no difference to block production. and for the long term energy efficient solutions are in testing now (for likely deployment in Q4): https://rayonism.io/ https://rayonism.io/