as Mark noted above, it is not the first time. When I first discovered this BB & joined the club, there used to be Round Robins quite often. Most were run by the same people & the same thing happened to them as did you. Maybe not such a good thing to name names if you don't want to, but if you do have another Round Robin, make all of the potential participants post here & you could respond "Yes" or "No" also on this BB...it won't be hard to figure out.
Once again, sorry that it happened & even though I've only participated in one Round Robin years ago (sigh....I miss Jill Bitner ), it's nice to see people still doing them...for the time being, at least.
Steve B