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Because purchase history is a critical part of the account recovery process.

Dont play games when you dont know the rules.

引用自 AmsterdamHeavy：

Because purchase history is a critical part of the account recovery process.

Dont play games when you dont know the rules.

but everywhere online says your history alone does nothing

引用自 MrBiscuit：

引用自 AmsterdamHeavy：

Because purchase history is a critical part of the account recovery process.

Dont play games when you dont know the rules.

but everywhere online says your history alone does nothing

Are you going to argue because you have 3 locks on a door that its perfectly fine to give one of the keys away?

Crazy thought. You already have leaked information out there and then you gave them THAT.

引用自 MrBiscuit：

引用自 AmsterdamHeavy：

Because purchase history is a critical part of the account recovery process.

Dont play games when you dont know the rules.

but everywhere online says your history alone does nothing

If it was completely safe to share private information, why would a scammer be asking you for that information?

引用自 AmsterdamHeavy：

引用自 MrBiscuit：

but everywhere online says your history alone does nothing

Are you going to argue because you have 3 locks on a door that its perfectly fine to give one of the keys away?

Crazy thought. You already have leaked information out there and then you gave them THAT.

i understand that but as my question stated how can they get in with only "one key"

It is funny to you because they haven't successfully robbed you yet, they most likely added you to a database for further attempts.

guy from Singapore possible also vpn.. i know his name.
tried to grill me in chat stating my games are trash.
clearly something cooking.. he had a username from the anime Bleach...

引用自 MrBiscuit：

i gave a scammer my purchase history with a few scrambled details like in my account was 69,420 dollars to troll as i new he was a scammer he said he was from steam but then i got a notification that someone tried signing in to my account and i needed to verify on the mobile app now obviously that wasn't me and the location said Singapore(likely vpn) so i was just wondering how did he get that far with just my purchase history

click his profile and press report.
report for scamming.

引用自 MrBiscuit：

引用自 AmsterdamHeavy：

Because purchase history is a critical part of the account recovery process.

Dont play games when you dont know the rules.

but everywhere online says your history alone does nothing

Purchase history does nothing apart from display your account name. Whilst this is an important credential, scammers cannot do anything else with the information such as attempt to recover your account as theirs. Scammers typically ask for this to appear in some sort of authority or to use the information to frame a scam about a fraudulent purchase - they usually use an accomplice or other account pretending to be a Valve employee to make the situation sound more believable.

As they do have your account name though, ensure you have a strong password and 2FA enabled. Also ensure that the password is unique and not replicated with your email.

scammers often thru the use support of try get peoples accounts transferred
so they try collect as much info as they can as evidence to exploit

引用自 AmsterdamHeavy：

Because purchase history is a critical part of the account recovery process.

Dont play games when you dont know the rules.

Words to live by!

引用自 MrBiscuit：

i gave a scammer my purchase history with a few scrambled details like in my account was 69,420 dollars to troll as i new he was a scammer he said he was from steam but then i got a notification that someone tried signing in to my account and i needed to verify on the mobile app now obviously that wasn't me and the location said Singapore(likely vpn) so i was just wondering how did he get that far with just my purchase history

'Sherlock' has clearly left the building when OP started trying to outwit a scammer and yet at the same time proving to be a PC illiterate by providing security info' onto others without actually knowing how harmful it'll be for himself/herself.

What a treat, ladies and gent's!

Edit add note:

引用自 LoveAndPeace：

scammers often thru the use support of try get peoples accounts transferred
so they try collect as much info as they can as evidence to exploit

1st hint: Know what you want to say then try to convey it through simpler words.

"Scammers often try to pose as Steam's support to get you to log into a phishing[www.merriam-webster.com] site and then colect your data without you realising that you're feeding them your security information".
And there you go and with dictionary meanings too, so that you don't get lost.

Next time report & block, OP