Came across mention of this today & thought, since there's so many people here that use Steam it would be of interest.
https://support.steampowered.com/kb_article.php?ref=3330-IAGK-7663#
Malicious users often operate in the community on accounts which have not spent any money, reducing the individual risk of performing the actions they do. One of the best pieces of information we can compare between regular users and malicious users are their spending habits as typically the accounts being used have no investment in their longevity. Due to this being a common scenario we have decided to restrict certain community features until an account has met or exceeded $5.00 USD in Steam.