Please don't try to incentivise users to vote or comment on your submissions, as you've done in your GiveLab promotion.

> Can I ask people to upvote my submission?

> No. Users should vote for a story because they personally find it intellectually interesting, not because someone has content to promote. We penalize or ban submissions, accounts, and sites that break this rule, so please don't.

-- https://news.ycombinator.com/newsfaq.html