Yes its a common thing .why they do restrict our account?
First of all its their wish secondly its depend on use.in below some of the reason what actually i've experianced.
Note: betting site like ( bet365 specially, and other low betting site).though bet365 offer highest limit then any other site.. .
Reason they restrict:
1.use account by wifi.you should use with mobile data.why? Cz wifi ip dont change.mobile ip change continewly.
2.playing regular in low odd .like 1.2, 1.3, with big amount.like1000$ in 1.2 or 100.
3.staking in cent . Like 11.56 cent
4. Using 2 or 3 payment method.should use only 1 method.sombody do deposit by skrill and try to withdraw in neteller
5. Should clear cach and cookies everytime before login
6.doing arbitrage most common reason
7. Sometime insane wining .we heard about this many time.
8.multipal device
Those what reason actually i found .my gist is genarally i am talking