A flagged/Restricted account could indicate fraudulent activity.
This may include:
1. Tips between same accounts, multiple times
2. Users logging on from unfamiliar locations
3. Abuse of our system (ex. Farming Rain and stacking it, Abuse of the wager system etc.)
4. Possible exploit that allows you to keep withdrawing free coins
5. Multiple Accounts
6. Irregular Play (Strategies and patterns that always go in favor of the player)
These are some reasons your account could get flagged/restricted. The time that the account will remain flagged or restricted is not determinate and in some situations could also be permanent, like if the reason is multiple accounts.