I'll have a target on my back
Just signed up to C ... with 2 other C riders, and an A rider

I think we all know he'll just go off the front on his own and 'win' the C race
Edit: a few more C's there now. And a D has signed up to the A group ... maybe our 'D' riders should follow suit?
I was tempted to join you in this to give you both a D to chase down, but I'm still a bit knackered from the weekend and all the travelling, so I decided I wanted a shorter distance and opted for a 6 lap Crit City anti-sandbagging race instead. Which is ironic, because sandbagging would be exactly what I was doing - trying to spend only just enough energy to win without going over power limits!
And I thought I'd managed it too - won the sprint, overtaking someone with 100 metres to go and holding off another behind me on the line, only for the results screen to show me in second, two and a half seconds behind the winner. Admittedly I was really only watching my avatar and the power numbers at top left and wasn't paying attention to the leaderboard on the right, but I did not see anyone in front of me.
Went back to review the video footage and it looks like this guy did 10+ w/kg off the front on the final climb and got such a huge lead that he was always at least one corner ahead (or sometimes was obscured by PR confetti or a power-up being deployed) and so couldn't be seen. He had about an eight second lead by the time the downhill started and then pretty much freewheeled to the the line, probably to make sure he came in under the power limit (not that I can criticise that) and that's the only reason why the result looks close in the end.
Strangely enough, his ZwiftPower profile shows he has three results above 2.5, yet he's still only listed as "Almost C". And he mainly does races like this that last less than 20 minutes, almost all of which he wins. Very odd.