To OP (might've answered before, I know I said it before, but since it came up in New Posts (again)):

Prisoner's dilemma. Or some other game theory thing anyway. Everyone on Dynamis assumes everyone else on Dynamis isn't staying for rouletting, so they DC hop. Then/also the "tolerance creep" occurs, where people willing to wait no more than 5 minutes leave; their absence in turn makes people who would wait 10+ minutes never pop, "screw this I'm out", they leave; then the 20+ min people lose their patience; etc.

At some point, you end up with only the vanishingly small number of "oh, this is fine" people with infinite patience, and no one else, routinely (trying to be) doing content. Then, the population/activity level of Dynamis as perceived by someone who's never before had to deal with it on a routine basis but has some level of optimism immediately sees a "over 30 minutes" pop ETA appears to be dead, because it functionally is.