No one can control spam if someone has RCs they can post all day. Earning is another thing. If you put up a low-value post and then use bid bots to promote it, that would leave you open to being downvoted. You are 100% in the clear, you don't spam nor do you abuse bid-bots.
When I get the chance I will make sure to make a clear list of who I downvote and for what reasons.