Let us be 100% transparent.
There's no catch. The deal is: you pay once and get access to the plan for its lifetime.
Here's the fair bit: CalHouse is sold as-is + the features we've promised above + more features we'll add, through what you + us will drive via our roadmap
In the future, we might introduce new plans, but for major updates. Take for instance the "payments" feature (the ability to collect payments when attendees book using your scheduling link). Our competitors have it, and it's massive. We might add that on a new, more premium plan later on, since it's a huge system of features. You would probably require a subscription to that plan. We're saying "probably" because we can't know what the future holds, but it's worth being honest and sharing this beforehand.
In all honesty, this would've happened in another way if there wasn't an LTD. The new premium plan would've cost, just like our competitors charge, e.g. $59/mo/user and would have required an update from the e.g. $19/mo/user plan you were on.
That said, make no mistake: our intent is to provide as much value as we can to our LTD buyers.