Except it’d be much less of a practical problem if the question “but who gets paid” would be taken out distributing excess energy.
How about this: power generation and distribution is not as easy as you think, it requires lots and lots of infrastructure and maintenance and that has a cost. If prices go negative too much it might become a problem to keep that running. There, that wasn’t so hard, now was it?
Negative prices are short-term self-regulation reactions of the market, they can’t stay negative long-term, just because of how the system works. So I’m not sure what you’re worried about.
Also, cut the condescending tone, it does nothing but make you look like an asshole.