[@Wayward]
That's one issue, but the tiering has always caused it to break apart. Different groups have different measurements for tiers because there's no unified tier system. So, two people who believe they're in the same tier will get into a fight. Let's say they're high tier. 

One believes that a high tier is a city buster, another believes that a high tier is a world buster. Obviously the difference in scope is noticeable from the start, but the two of them agree either due to a lack of system or due to a lack of reading the other's sheets.

So, they get into an argument immediately, and this continues until every single participant is arguing more than they're actually playing.