I don’t quite agree with this - OP holders are entitled to have an opinion, and it’s perfectly fine if they sold. They may have sold for many reasons - a) they were just farming the airdrop [in which case they are still distributing the token], b) they think the price is too high and want to buy back lower, or c) they are selling to fund development on Optimism.
Someone who sold may still be committed to Optimism’s success.
What I’d support is a bonus multiplier for those who claimed, delegated and did not sell; also it’ll better inform mitigating more sophisticated sybils.