Is running a lifetime deal for quick SaaS cash ever actually worth it?

Offered a one-time lifetime deal at launch and got a thousand users right away which felt amazing at first.

Turned out those users created most of our support tickets demanded tons of custom features and paid zero monthly fees.

Switching to a normal monthly sub slowed growth down, but paying customers are way easier to work with.

Have you guys ever done lifetime deals or do you stick strictly to monthly plans?