I'm with Hummers as well. It would be a different matter if it had been an impersonal and anonymous "here's a 1-year record and we at the UMCA offer it up for challenges". It wasn't like that: it was Steve's idea, possibly born from a thread on this forum, he did all the hard work negotiating with the UMCA to formulate the rules, it's his ride. As soon as UMCA published a set of rules, a couple of others jumped on the bandwagon.
So we don't like it. Tough, so we deal with it. But the guy's doing nothing wrong, and has in no way interfered with what Steve is doing here, nor has he said or written anything at all to discredit TG, AFAIA. Publish a set of rules and you're going to entice interest. Anybody think this was easy thing to do!
What exactly does Steve own? Nothing whatsoever as far as I can see. Hard work, yes obviously, of course. But ownership to the ride? No way.
And the way he's handled it is the measure of the man, both on the C4 news interview and the stuff he's tweeted.
I doubt he'll be wasting too much mental energy worrying about what anybody else is doing anyhow, it's stress he can do without.