If you're looking to score a Limited Test invite to Counter-Strike 2, don't. It's impossible.
Valve recently and very characteristically confirmed that Counter-Strike 2 is coming out later this year. In the same announcement, the infamously casual private video game developer revealed that Counter-Strike 2 is currently undergoing a Limited Test run exclusive to a handful of players.
Unfortunately, a lot of players didn't get an invite, resulting in many to wonder how to get one. This also gave rise to scammers looking to prey on on gullible Counter-Strike players by "selling" fake Limited Test keys.
Valve is now warning players not to fall victim to such scams. The company clarified it's the only one capable of granting a player access to the Limited Test for Counter-Strike 2. It also dispels rumors that Limited Test keys exist. The Counter-Strike 2 Limited Test is an option found on the original CS:GO main menu for qualified players.
Valve never sent email invites or Steam notifications to let players know they have been invited to the Limited Test.