There are many reasons why your account got banned. First, in your adwords account if you got suspended for circumentive policy, it should have to do with your website, keyword and landing page. This has nothing to do with the account where you are using.
1) your landing page should look adwords suspicious.
2) the keywords you are doing are high risk keywords
3) you have violated their policies
No one knows exact reason why an account gets suspended for policies, as google will never answer. But this is my experience on circumventing the system.
I worked with an cryptocurrency campaign with an client, the website is good and also got approved in adwords, however before the campaign is created there was test campaign which ran for couple of days and it has nothing to do with account.
As soon as i created the campaign of the client and then ran it, i got suspended for circumventing system, even though i see that the campaign is approved and ads are approved. So i tested using another method with the same campaign.
Instead of working on an individual account, i have ran it on an business account, and i created a new domain and used a good landing page and just showed some tips in the new landing page and then cloaked it.
This time it worked, for couple of weeks, until adwords found it. But finally atleast i found out, it got resolved. Again adwords are reviewing campaigns now a days manually. They are manually visiting the website and having a look at it.
I checked with their ips and checked their manual visit as soon as we created campaign. This happened to me couple of months before. But i am working fine as of now.
So just experiment the same using different methods, you can get it working.