My understanding is that Twitter allows for username reuse, so a major company deleting their account would be an even greater brand risk than just letting it g

My understanding is that Twitter allows for username reuse, so a major company deleting their account would be an even greater brand risk than just letting it go idle. (But even if the account doesn’t go idle: I think there’s a significant difference in kind between a company’s account being generally active and paying for advertising to appear next to increasingly extreme and negative content.)