Who else would do it? FireRTC is really known in the scam baiting community. Scambiater like to abuse scammers. Logically it was probably an scambaiter that took it to for and/or probably fail to realize it was an legit company. That is actually more common than you think. Scambaiters thinks that an company is a scam but in reality its an rip off but still not an scam.
There are also scam centers that think they are an legit company such as myphonesupport that could have reported it to local law enforcement or attempt to sue FireRTC for damages.