I'm not sure about anyone else, but I noticed changes in the Keepvid application years ago. I've been a paying customer of the Windows Keepvid application for years. However a year or so ago, I noticed that my registration key was failing to authenticate.
After an e-mail to their support section, they offered to sell me a "new" copy of Keepvid at a discounted rate. Since I paid for a perpetual licence, I argued this and only after one e-mail, they offered me entirely new registration details, for free, for their online service. But that required me to register... etc... etc... and something didn't feel right to me.
It was at that time it appeared that Keepvid.com and any associated services had either been taken over or bought out by some other company (whoever responded to their e-mails appeared to have no idea and their English was poor). I'd say it has changed hands at least once.
Keepvid hasn't been the same for a long time and to me, it has been dead in the water since not long after version 1.146 of their application (from around 2013; pictured in the screen shot).