Steam Friends Mystery


The 47 Ronin
This happens all the time, but I never cared to look into it or ask others until now.

Do you guys get an instant message box from a friend on Steam, but all it says is "____ has started CSS, Join now" or something to that effect?
They didn't type any text and it doesn't look like any official "invite a friend" message. My notification options are left unchecked.
Last night/this morning, the 2 were from Grego & Soap. So you two, tell me the secret. :)
Haha my shit sometimes doesn't work well for the chatbox. I was trying to msg tortilla and it was like dd aasroewiruls. I just had to use the cursor and click back on the box.