In my opinion, WUS is way too broad. It's a huge forum, and includes everyone from Rolex owners to repairers of ancient carriage clocks. It's like putting the Facebook logo on your watch just because you joined a small Facebook group with some cool people and designed a watch together. Why do I want to walk around with an advertisement for an online watch forum on my wrist?
On the other hand, putting "designed by a small subset of the F10 subforum on Watchuseek" on a watch is also a bit cumbersome. My preference is either leaving it off entirely, putting something subtle on the caseback, or else making our own logo/symbol that represents this particular collaborative effort.