Everyone (DevOps, Developers, Web designers or even Gamers) who cant expose his local servers to the internet.

The active tunnel is the tunnel which is opened at a given time per account, let's say you have an http tunnel running at work and another one at your home, so in total you have two active tunnels.

A slot is a measurement with 10 tunnels and 10 reservations so 2 slots means 20 tunnels and 20 reservations.

Yes you can.

There is no limit as long as you dont exceed the tunnels limit.

Yes you can cancel your plan at any time from your account dashboard, if the cancellation is done within the first 15 days then you are eligible for requesting a refund, otherwise your plan will be valid until the next billing cycle you've chosen (monthly or annually). To apply for a refund, all you need to do is get in touch with us and request the refund and provide us with a reason validating your request so we could properly review and document your case.