Is that some kind of a new scam?

No idea why he would need me to add him as a friend, instead of him just sending me a request

yep, obvious scam.

Trust yer gut.

It is not exactly new, here you go. This just seems to be a variation of it

It's bullshit, if it's that important why they say it? What would they even want from you? (Besides begging for something that you already have X games or something) What can be told about a scam that didn't even include you?
Even worse and more pointless than the "accidentally reported your account" scam, there at least it sounds like you can lose something.

I like that an image of a scam has "Beg" in the URL. Seems imgur knows what's up.

You know, if you have to ask "it is a scam?" you can be almost certain that it is.

When something doesn't smell right, just block them right away, no questions asked. =)
You owe strangers on Steam nothing. ^^

Most likely a scam attempt, I had a similar message a few weeks ago about me needing to send them a friend request because they falsely accused me of something and they wanted to make it right or something... Not sure why they don't just try to add you first, but it's 100% fishy.

100% scam. there is no reason to believe the word of some internet rando. if your account was used to scam others, i think you would hear it from people on your friend's list first.

definitetly scam, typical speech of them

by the way··
It is not my story, but recently, it seems that there was an incident that the Steam account password leaked by the invitation from ”CS:GO” and accepting.

CSGO Exploit Allows Hackers to Steal Passwords | Game Rant
https://gamerant.com/csgo-stolen-password-exploit-hackers/
‘Counter Strike’ Bug Allows Hackers to Take Over a PC With a Steam Invite
https://www.vice.com/en/article/dyvgej/counter-strike-bug-allows-hackers-to-take-over-a-pc-with-a-steam-invite

Problem vulnerabilities say that "user STEAM account passwords are stolen by accepting invitations from attackers," not only user chat but also on community invitation systems, attackers It may also have a large number of account passwords at a time.

It seems that Valve has fixed.
However, if you have such a matter before a while, it would be better to change your password.

Not a new scam, but definitely a scam. Had people try that twice on me. I trolled them back a bit but then they stopped replying.

Had someone who was already on my friends list do this, we played a couple games together so didnt know him that much. Anyways, he was stupid enough to try this on me with his MAIN ACCOUNT. It had a fair few games on it too, then i remembered this post, it was done exactly the same as this. They get you to add a 'steam employee' on discord, then that person asks to see purchase history and account information. I decided to play along up til this part, then i sent him one of those p*rnhub ads that say 'do this to grow your pp'.

Yes, it's probably scam, they already written comments to my profile (2 humans), one of them been like people, but after has been banned, other - i don't know, he doesn't answered to my comment (it's been in 2020)