I'm agree with you that bot to buy upvotes are not correct but I think you set your level of request too low because I just have been also blacklisted while I did only manual requests...
"Vote request failed! You have been blacklisted!"
When we receive a message as below, what is the problem to send one or several new requests with another amount to try to match ? :
refund: Sorry, we could not upvote you with *** ⇒ $****, please try a different amount. Our website https://www.minnowbooster.net has a graph with what sends are currently working.
Please tell us what we can do to have again access to your services as I never used bot to buy upvotes. I'm just using your website with your internal wallet.
RE: MinnowBooster Update: Automated Upvote Buying is Officially a Breach of MB Terms of Service