Abuse is a matter of opinion. Steem Flag Rewards has a category of 'bid bot abuse' that may be considered to apply to your posts.

As I mentioned you are taking a lot of rewards for some posts that not many people seem to read. There is a limited pot of Steem to be shared out. I know it is taken as normal to buy votes, but it is optional and does not guarantee readers. Better to build a following by other means such as commenting. I have not flagged you and could only take a few cents off anyway. If you were doing this on a daily basis as some people do it would be more of a concern.

You have been on Steem a while, so you should have some idea of what actually works. It is up to you how you proceed, but given the state of Steem with a falling price and people not sticking around it is worth thinking about how you can help improve matters. I do it by supporting others and I get some support in return.