“I've been annualizing all my subscription fees for a long time now and dealing with the resulting number, but that's still an unpopular approach.”

This is my trick. I simply take the monthly price and multiply am by ten to quickly get a crude imperfect annual cost (adding two more months if I wanted to be exact)

Then I’ll look and go gee is this thing actually worth $150 or whatever the value is and ask “or more” assuming I wouldn’t cancel?

The answer is usually no. I’m slowly teaching this trick to my elementary school daughter.