Help
How the cs2traderstart.com trade preview behaves. This is an independent site, not SkinsMonkey, not Valve, and not Steam.
Sign in via Steam
The yellow Sign in via Steam controls go straight to steam-auth.php, which redirects you to Steam's own sign-in page. This site does not ask for a Steam password. If Steam confirms the sign-in, you see a short page with the SteamID64 and a link back to the trade screen. If the check fails, the page says sign-in failed.
Other controls
Other clicks on the trade screen can still open the on-page message. That message says the yellow button continues to Steam's own sign-in page. Close it with Close, the backdrop, or Escape.
Links that do not open the message
Policy links, the cookie banner, and the independent notice do not open the sign-in message. About, Help, Terms, Privacy, Cookies, Contact, and Refund are real pages.
Cookies
Accept and Essential only store one choice in this browser. Clear site data to choose again. Details are on the Cookies and Privacy pages.
Trades and refunds
The trade screen does not execute a trade and does not take payment, so there is nothing to refund. Questions can go to contact@cs2traderstart.com. Mail may take a few days.