There are a couple of ways to estimate the number of online femdom girlfriends. One way is to look at the number of professional dominatrixes who are listed on major femdom directory sites.
Based upon these approaches, it is estimated that there are in between 100 and 1,000 active online femdom mistresses. This is a relatively small number when compared to the total variety of expert dominatrices on the planet, which is approximated to be between 3,000 and 5,000. https://cleardex.io/?p=764 However, it is important to note that most of femdom mistresses do not market their services online, so the actual number is likely to be much greater.