There has been talk of reducing the inflation rate I saw an SPS proposal for it but I don’t think the community really gravitated to it since it’s a stop gap solution that may not have the desired effect and because it would require a hard fork

Burning or reducing inflation also takes a while to see effects I think if it was a natural part of the user experience like part of

Quick power down
Promoting your posts
Buying ad space
Securing a smart contract
Selling directly to fiat

It could all help

I like your idea of having the inflation sort of pegged to the demand/user base and released as we hit certain amount of daily active users that could give the reward pool a lot more flexibility and be agile to what’s happening on chain and encourage user growth