Can I use BlockSurvey with multiple accounts

BlockSurvey accounts operate on a per-account basis. This means that the Account ID, Account Username, and Blockstack ID you use to log in to BlockSurvey are tied to a subscription (if you have purchased one). 

Currently, each account requires its own subscription under the Personal plan. We don’t offer a way to purchase one subscription for multiple accounts under the Personal plan.

If you subscribe to each account individually, you will be able to use them.