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Any explanation or solution?
After disabling my Copper Membership, the pay-per-post is now registering correctly. So, it seems like Copper Membership usergroup does indeed mess with the rate of pay. At least in my case, that is what happened, but my fear is that any Copper Member users will experience the same thing.
Is this the proper place to report this kind of thing?
That's interesting!
So, all though yobit's system has detected you not to be Sr. Member or above ("only" copper member), you still got paid, and even with an adjusted pay rate.
So we may assume that lower ranked members can apply as well?
I don't think so. The bot checks for the full signature. A Full member has lower limit of character than a senior member.