Please, no captcha requirements, bots already have ways to deal with those and they just serve to annoy legitimate consumers. I've gone through an mmo in the past that dropped captcha during actual playtime and all it did was piss off players, it hardly stopped bots at all. IP ban+hardware isn't going to work either because of VPN workarounds.

As stated in another thread, player ran chat filter is a decent way to block the spamming. It's worked for other mmos that allow it.

Yes, legal action is too much effort, cost, and time that most companies want to bother with, not to mention the above reasons. It's 2020, and RMT spam is still a problem unless they implement a player run chat filter, preferably allowing regex/wildcard. If it's too complex for people to wrap their heads around, all it needs is someone making a solid effort and the rest can copypasta line(s), and gold spamming'll be irrelevant. Atm, using/creating a third party filter is quite difficult to impossible due to the combo of gameguard/microsoft integration.

I don't know why most companies don't add a chat filter, I can only think that it gives negative connotations, maybe player abuse, and some probably want to deny that RMT is a real problem. The mmos that allow addons/have a built in filter, WoW/ESO/Runescape/BDO/etc...their gold spam is hardly as intrusive until it gets to say, mailing/invites/etc.

Sadly, supposedly JP PSO2 also doesn't have an RMT issue, gl trying to get Sega to do anything when their cares are Japan centric.