Society has evolved a lot and social interactions/normals have evolved with it. It only makes sense that people would change how the interact online as well. You can find countless studies and documentaries on how people, as a whole, are getting lonelier and lonelier, even though they have access to interacting with more and more people.
The truth is that a lot of players are burnt out on the campy social groups and guilds. We’ve all met hundreds, if not thousands, of people, hung out with hundreds on discord, yada yada yada. The more people we meet, the less enticing it is to meet even more people because it becomes increasingly difficult to keep track of tons of people, who’s who, etc etc. Wait, who are you again? Oh that’s right, we were in that run together last week, wait, were you the one with the goldfish…?
So using metrics like RaiderIO is nice because it helps you swipe left or right on potential applicants.