I have no issue with people buying and selling votes, actually. We live in a free world and people are free to spot market niches and create services that others might value. Good for them!
And the people who do not value those services don't need to buy them. Just like in real life. Live and let live.

UPDATE
I just realized I totally contradicted myself, LOL, I have edited my answer above. I don't know why I mentioned the vote selling in my original answer.