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I wasn't even aware that selling upvotes was an issue...

Oh - wait... I think I know what you mean. Things like randowhale and upgoats and the such.

I am surprised that I didn't think too much about that until now.

One thing that I shall be doing is modifying the original post to include all your collective feedback on problems that I did not mention or not sufficiently so.

Thank you, both for the up-vote as well as your succinct but helpful comment @financialcritic. :c)