Any interest on a de facto stablecoin that stays in your wallet with no use looks like a scam :) How can you be rewarded for nothing? Banks pay out interest on deposits, because they spin the money. Liquidity pools pay out for providing liquidity. Crypto staked on exchanges is usually used for leverage trading. HBD in Savings is in Savings, and nothing else.

The interest rate can be kept for months, years perhaps. But from my point of view, it does not bring any benefit to the network. Quite contrary, I'd say. I tried to express my thoughts in this post putting down keen reasons for decreasing the rate. The discussion is maybe even more interesting than the post.