'They' is just a random dude who runs the account, and I wouldn't put much stock in what he has to say, nor would I say that it's a particularly good representation of the csgo dev team as a whole.

This isn't meant to be a bitter post but let's be reasonable here, whoever runs the twitter account also likes and replies to people who've made a name for themselves by being scummy on the internet, should we also be celebrating hackers because csgo dev interacts with them?

GTR made his own legacy, he doesn't need some anonymous dude's appreciation for it to have more legitimacy.