I agree. Only vote on posts that interest you, not just for reciprocal votes.

I think your wording is good, but I would say it a little stronger, and explain why. If we're being honest, how many people actually go there to vote on posts without hoping for some votes in return. If those posting on the channel don't follow some links and vote, then who else will? Also, by interacting there, you can build some relationships and find people to follow.