You are talking about an airdrop I think. Whenever there is an airdrop, usually social media booms. I dont think Cromhub needs this tho, but it would be a good publicity
Every one likes free money. So making them join your social media as a priority to get the coin, trust me, they will Join. Even if it means retweeting your tweet just to get more publicity.
I agree with all the points mentioned about community building, social media campaign, etc.. But how much percentage of the whole community will invest in it? I never heard about airdrop from CROM. Even the bounties and bonus offering from CROM is not generous. May be CROM team is super confident about their project and ICO.
I would love to hear the status of ICO from CROM team.