The system accounts for use of voting bots and that is why we have weighted votes.
This is a great investigation but I don't think this is particularly evil.
It is a bit naughty but if people like the content then where is the harm?
It shows ingenuity.
Also I think there may be certain view or opinions that certain people may not feel comfortable making under their known account e.g. about their sexuality or something else sensitive.
I don't see the harm in this. We already have multiple bots voting anyway. If I had several accounts I would probably vote for my own posts in the same way that I might also pay to promote them.
If someone was creating hundreds of accounts then I might see the issue.
It is shady as hell and one of the reasons I haven't put my actual cash into this system.