Twitter old managements are not that commercial savvy. They only introduced blue mark like a couple years back even though Twitter has been more than a decade old. Also, almost every governments and celebrities in the world has twitter. That are gold mines. Imagine USA defence department or IRA being forced to pay 1 K usd a month (this is already consider low ), if not the twit handles given to North Korea or Putin to mess with. The old twit mgmnts are rather incompetent with their pursuit of affirmative, diversity, race theory type of agenda in the last 3 years. You can see those with conservatives view largely will get suspended while liberals and lefties (some questionable middle east groups) are allowed. I doubt that attracts ads money.