There is a link to the story - read it! This guy spent a lot of his own money to help make this available and you only are asked for 10 pounds IF you are in the database for additional info to help them cover their costs.

It's all in what you love. I wouldn't worry too much about not keeping up. It's all trade offs anyway. What you may (feel) you lack in new skills, you have in spades in business knowledge and longevity. On the other hand, if you think you'll like management go for it. But don't do it out of fear that you cannot keep up.