TrackJS users can start new accounts and belong to multiple accounts.
To create a new account owned by your current user, go to the Switch Accounts page from the upper-right user menu. The last option in the list is to create a new account.
New accounts created this way have no trial period. You must choose a subscription for the account immediately upon creating the account.
To join an existing account, an Owner of the account must send you an invitation from their Team Management page. You will receive an email with a link to join the account. Once joined, the new account will be visible in your Switch Accounts listing.