The reason I say this is that when Kevin asked for donations to buy the program needed to run this site, some of us (including me) sent him money but there was never a word of thanks from anybody, including Kevin. People who know that their help is appreciated are more likely to give.
I personally feel that a list of contributors should be posted, with the dollar amounts contributed.
Finally, I don't use Pay Pal because I don't like to give out information about either my bank account or my credit card numbers over the internet. Accordingly, I submitted a request to be given a mailing address where I can send a money order but haven't heard zilch from anybody.