Disco Flash Sale Bulk Discount

Very cool app. Added a BFS to our shop in under an hour, looked great, worked well. The only thing I don't understand is why this app charges monthly and yet it's for one weekend every year. There's just no point in paying for it for a year to use it once. I'll be canceling and re-installing next year. This means the devs don't get paid (which they should as it's a great app). They should charge a one-off fee which I would happily pay.