Do I need a subscription?

No. A Trip Pass is a single purchase tied to one trip: no renewal, nothing to cancel. If you don't travel, you don't pay.

What happens to my free trip?

It stays active as long as you keep it. When you unlock a trip with a Trip Pass, that trip leaves the count and frees the slot for a new idea.

Does one pass cover all my future trips?

No: one pass unlocks one trip, that one. You can rewrite and regenerate it as much as you like, but it stays tied to its destination. The next destination needs a new pass — or one from the bundle of three.

Why is the limit about days?

A weekend away stays free, always. The pass is for the real holiday, the one where three days aren't enough and planning actually matters.