All twitter accounts will need PVA or eventually will need PVA once you start tweeting. Twitter accounts that are created without PVA are using the mobile app exploit but the issue with this approach is that you will get request from Twitter to verify your account with PVA eventually when you begin to use the accounts. Basically this is a number game, the more twitter accounts you have following different niche, the more potential audience you have. So you simply need more PVA twitter accounts for your objective and replace them when reverification is requested.