I'm sorry to admit but I never looked this up before
but just did now. The WDSF has its history and structure documented on its site:http://www.worlddancesport.org/WDSF/History/How_It_All_Started
According to this its an entirely democratic organization with openly elected (limited term) leadership, including its president, and governing body. However, although there are 4 year elections, Detlef Hegemann was the president for 33 so I guess there are no term limits (usually added to stop an organization becoming static). It would be great if they added a two-term limit to keep the organization dynamic. I can see no indication whether the leadership is paid or not. It would seem hard to run such a large organization if they were not.
On paper it looks great - but I think it a shame that there has been so much friction with the other international bodies - I can't judge this as I know too little about it but maybe the WDSF (and WDC) could learn more from the Freedom to dance movement...