As with everything else, change is the only constant.  I think a lot of the mid-range ladies who used to frequent these boards were scared off by (1) the Feds raids on websites, (2) the drugs, pimps, thugs and robbers that gathered around the backpage replacements and (3) the time and expense involved with finding an overseas web host or posting on Eros.  I'm hoping for a turn-around, but it may take a few years.