When I created an account on the site it offered a free account or a "subscription" account. The subscription price was shown as being $10. However, I was unable to tell if the $10 was monthly, yearly, or lifetime. So I created a free account on the assumption I could investigate that later. But now that I have an account I don't see anything about a subscription anywhere. I would like to make a modest donation (being retired it does have to be modest, sadly). But of course if I did that by buying a subscription that enabled some additional benefits that'd be nice.