<isLimitedAccount>1</isLimitedAccount>

You will need to spend at least $5.00 USD within the Steam store.
https://psteamhelp.yuanyoumao.com/en/faqs/view/71D3-35C2-AD96-AA3A

What features are unavailable?
Limited user accounts are prevented from accessing several features on Steam, including but not limited to:

Adding friends (limited accounts can still create quick invite codes)
Voting on Steam Reviews and Workshop items
Participating in the Steam Market
Trading Steam Community items (trading cards, booster packs, gems, etc.)
Making your Steam profile visible to non-friends
Posting frequently in the Steam Discussions
Gaining Steam Profile Levels (Locked to level 0) and Trading Cards
Submitting content on the Steam Workshop
Posting in an item's Steam Workshop Discussions
Creating public Steam guides
Accessing the Steam Web API
Using browser and mobile chat
Adding public artwork and screenshots
Adding messages to trade offers
Creating Steam groups
Creating a Steam Family
Counting towards Steam group membership
Following/adding curators
Posting hyperlinks in the Steam Community
Adding a phone number from some countries or under certain circumstances

If you haven't spent any money on the platform, you don't get the same privileges as paying customers.

And if you don't own a license to the game, you cannot leave a review to it.

That's a way to quench spammers/scammers and bots from infecting Valve's properties...

What scammer wants to SPEND money... they want to STEAL money... it's a kind of deterrance...

But then we can question how effective that deterrance is...