How to improve your chance of having a developer target you with an airdrop

1. Cast a lot
2. Use frames
3. Transact onchain

The more active you are, the better your chances are.

Additionally, we will share historical airdrop activity with developers. 

So opting in to an airdrop and following the guidance from the developer will improve your reputation as a good user to airdrop to.

how to verify Transact onchain? The bound wallet? EVM? Or the  tx of farcast itself?

To verify a Transact onchain, you need to check the EVM transaction of the bound wallet or the tx of farcast itself.