Well, I would personally prefer it if people sold Glest and all profits went to the Glest Team themselves, not some guys who realized they could make an easy buck by selling someone else's work and taking all the profit.
For example, a few years ago, I purchased an official disc for OpenOffice.org. I had a few reasons behind this. First of all, my internet was too crappy to handle the download, secondly, I really needed a word processor, and this is still way cheaper than Microsoft's version, and three, its a good product produced by a company that has many free programs that we often take for granted. It deserves my donation.
Now, if only the Glest Team had a paypal account to donate to... It does make me wonder, how do they afford hosting this site? If they accepted donations, I'm sure that would help drastically (though hosting costs are as low as possible, even some as low as $5 a month, with good enough specs to host a decent sized site).