I thought it was a great idea for official statements. Kind of like a new type of RSS feed.
Local transport companies can advertise delays, meteorology organisations can advertise natural disasters, police can post active missing person alerts, etc.
But it seems like it is just vapid narcissists thinking other people give a shit about their random thoughts.
Why wasn't RSS as popular as the original Twitter?
I'm not sure what the answer is, but I suspect it's the same answer.