Firstly, let me say that I find the concept of the WikiTree wonderful. Secondly, I have a family tree of over a thousand that I'm interested in porting over to this format and continuing my work here.
Before I do so, I have a concern. Ten years ago, I was a member of a wholly unrelated specialist encyclopedia wiki. I voluntarily contributed a lot of time, expertise and info, along with thousands of other users. The site was owned by a couple of individuals, however, and in their Ts & Cs, it did state, similarly to this site (Terms section 5), that any content I created could be sold by them license-free. They did so in 2009 for $200k to Wikia, having had other people do most of their work. The Wikia experience destroyed the site's userbase due to their desire to monetize it through aggressive advertising pop-ups and videos.
I'm concerned in the same way that in ten years, nothing has changed with regards the wiki format and legality of ownership of content. Whilst I would have no desire to keep any ancestry private, and I do believe that as much genealogical information as possible should be made freely available to those who seek it, I would rather not see someone else make a hefty sum from selling the results of my hours of research, sourcing, organisation and collaboration with others to, eg, Ancestry or FamilySearch (even Google or Microsoft if they decide to enter the industry).
I was wondering if the community, or staff here, had any thoughts on that?