I've not donated for years but I have done in the past and plan to again in the New Year.
Although there is no payment, I still donate because, unlike some, I actually want to help my fellow man and don't expect payment for it! Mind you, they do bring you a paper, a cuppa and some snacks so it's not a one-way street by any stretch.
For the record my blood is A RH Positive. It's a fairly common blood type (so I'm told) and I really need to get donating again. I've not donated for a few years for a number of reasons.
The last time I did, I had a bit of a scare. It was my own stupid fault for donating blood, forgetting (trust me, I AM that dozy!) and then trying to play DDR a few hours later. Halfway through Ecstacy (on Expert) I near collapsed! I've not played DDR since...
Wardy