I don't know if I can help, but one bot I liked is MSP (@minnowsupport) they have discord page where you post your link and it gets upvoted... for me the upvote power is always between $0.06-0.50 ...lately in the lower.

Why I liked it?

It's not automatic but manual, you have to send them the link to your post yourself... so I can manage which of my posts be upvoted by them and which not. I don't know if I can explain why I don't want all my posts upvoted by bots though.

I used @minnowpond for a short while, and it being automatic was something that made me decide to stop using them for a bit.