You’re a developer building a new token-based product.

Your goal is to acquire users for your product. You’re considering an airdrop as a tactic to do this.

User A 
History of not selling airdrops immediately.

User B
Sells most airdrops immediately.

You can only airdrop to one. Which one do you choose?

If you're airdropping to random wallets, User A would be a more ideal target. 
If you're airdropping in order to "reward" your user base, it shouldn't be your concern what they've done with previous airdrops.