I speculate that much of the XRP Army on social media were fake and from farmed accounts created in an office hehehe.
Account farming was also done here in the forum before the merit system.
I don't think that the problem is because of account farming. In my place, Ripple was very hyped in 2 or 3 years ago. But over a long time, it hasn't accomplished any new development. This abates its investors' interest. Also, a number of people have realized the fact that Ripple is a centralized coin and stop following its social medias.