yep, I think the resource credits system in steem works much better, because you can just see it recharging. Although I recognise I say this from the position of having been here a while and having accumulated more SP than your average n00b.

Tron has a similar "bandwidth/energy in exchange for freezing tokens" but if you don't have enough the contract will take TRX from your wallet instead which takes some getting used to. It's tiny amounts but still...