I totally agree. I was just going to say the same.
True story - I've been using this wonderful app for years, (the free version because I don't really need the advanced features) and this morning I woke up thinking about the number of times Rainlendar has saved my bacon by helping me to remember important dates and keep track of tasks. I thought, I need to do something to say thank you. I was planning on making a donation via PayPal, but when I turned on my computer, there was this polite little message from Rainlendar which I had never seen before. It asked if I would like to purchase the Pro version at a discount price. So I did. I may still make a donation because this was way too cheap, but thank you!
Rainlendar looks great, is a joy to use and easily the most important piece of software on my computer.