When the "new" Tsum Tsum Subscription program started last year there were two options. Subscribe for the entire year or subscribe Month to Month.
There has been some speculation about how long the Tsum Tsum Subscription program would continue after the year was over (if at all); however, this morning the Disney Store sent out renewal notices to people who signed up for the Annual option to remind them that it would auto renew (for another year) next month!
It is possible this is an automatic e-mail so this doesn't guarantee it will continue; however, it is a good sign that it will!
Here is the e-mail: