I'm going to be negative, sorry.
I think your biggest difference from Patrick is that you are in a B2C situation where he's definitely in a B2B situation.
A teacher or event planner needs to make bingo cards to save time - which is money.
If I just want to type better, I have to justify this expense as a consumer. Is this something I will spend $9.95 on? No. I'll probably spend 20 minutes looking for a free typing tutor that will ultimately have me repeat type what I see on the screen until I get better at typing.