External Funds Used - ie how much you have spent on Steam
https://gtm.you1.cn/helpsteam/en/accountdata/AccountSpend

Combined software list - whilst Steam Store version is broken:
https://gtm.you1.cn/storesteam/software

View entire Steam purchase history:
https://gtm.you1.cn/helpsteam/en/wizard/HelpWithPurchase

Look up computers used with Steam:
https://gtm.you1.cn/helpsteam/en/accountdata/MachineAuthName

Look up Steam log-in history based on location:
https://gtm.you1.cn/helpsteam/en/accountdata/SteamLoginHistory

Steam game licences:
https://gtm.you1.cn/storesteam/account/licenses/

Spot any imitations:
https://gtm.you1.cn/search/users/#text=ploppo

A guide on Steam bans:
https://gtm.you1.cn/sharedfiles/filedetails/?id=961168214

Profiles you have reported:
https://gtm.you1.cn/helpsteam/en/accountdata/MyProfileReportsMade