Having a basic understanding of how computer work and think will be vital to navigate society, as more and more parts of it are digitized.
I'm not saying that everything becomes crystal clear after programming 101, or that IT systems can be understood after learning "Hello World" and IF-THEN-ELSE, but it will become more and more useful to navigate the modern world.
My 2 cents:
I was once in your customer shoes, and I choose the annual plan because it meant encouraging the product, helping it not to go bankrupt.
If your product/company is quite new, and provide something that people love and want to make sure stays available, they will help making sure it does. In your case, pay for the annual plan means pay more money to you in the short term, helping your balance sheet