Chains value devs
Devs value users 
Users value rewards 

incentivize users to try every app on a chain via sequencer fee distributions 

and also give a bonus for them to leave an attestation review so app builders get feedback (which is then filtered by an LLM for legitimacy).

lore @optimism | ex: @coinbase | views are my own | what if it all worked out? 

Just to be devil's advocate (or just a bit of a dick) you need to add:
apps value returning users
Returning users value real-use cases

It’s not just rewards. Users value use cases. There is an intermittent step between devs and users. Call it brands, companies, DAOs whatever, those add the value. Individual users are overwhelmed with apps. There is no more novelty with just tech.