Hello!
Your account may be restricted due to your alleged "commercial usage" of data.
Click on the "i" button next to the market name (any market) and check if you can see a red label like the one in the screenshot attached.
If you do, you need to email them saying you did not realize you were violating any rules, and that you will make sure you will place real bets, not just monitor markets. They are usually quite loyal towards users who got their accounts restricted first time (besides lots of people do not realize this can happen to them).