Unfortunately I’ve had to pay for an extra cell phone line just to use the app for work. VOIP numbers are rejected and must be unique per account. In my case it was likely because I had the audacity to back up my chat messages with a script. After a few years I can make new accounts again but I feel like I’m playing Russian roulette every time I do.
If you don’t use separate accounts for privacy someone can dump a list of potentially any known server you’ve ever been in. I knew it would be only a matter of time until something like this would happen: https://www.reddit.com/r/privacy/s/A5nvuZBLab