Ian - I really do appreciate all you have done. This Forum has taught me much, been a great information resource on all things aviation (++ at times).
While I admire your altruistic approach, I can not bring myself to make a donation ($??) - ask me for a membership fee, known $ amount/annum, that will if all pay, cover your costs and then some and I will gladly subscribe.
As a cash strapped retiree, I also appreciate your sentiment "It would discriminate against those that can't afford it" but in reality recreational aviation is an expensive hobby - a nominal fee, to your Forum, to access information that may save hundreds - thousands of dollars, as well as a life, is worth a small annual fee/investment.
I suggest a compromise;
Non members can access the Forum, in a read only capacity.
Member can submit topics for & enter into discussion.
This may address, to a significant degree, your altruistic intent, to make, potentially life saving, information available to all and ensure the long term continuation of the Forum, by assist with the running costs .
😈