- If some people donated a substantial amount towards a prize, then a non-donator won, there would be some resentment caused.- In a similar circumstance, people could donate could argue about non-donators winning, and start demanding that any prize contests are for donators only, leadin to further resentment between the 2 parties.- On a more personal level, I feel that donations should be spent on the upkeep of the website, rather than on big prizes, as the website is the most important thing.
Everyone here generally doesn't map just for conest, but to produce good maps for the enjoyment of the general public. The contests are just a sideline to all that, and the prizes are a tiny part of the contests as well. I've been on forums where there have been no prizes at all for winning mapping contests, yet there have always had plenty of entries, because of people's love of mapping.
If enough donations come in to pay for the website for a period of time, perhaps put the money normally used to pay for the website to one side. Keep saving that money until there is enough for a prize. On the odd occasion, a small prize would be fine, like the recent $50 gift card, but generally, people should be entering contests for their love of mapping and the competing against fellow mappers, not just to win an occasional prize.
In general, contests = a big YES, prizes = a small one on occasion, but donations should go towards the website's upkeep.

so. i had the extra cash, and i love this website. so i donated. and in time will probly donate again. not for contest prizes. although those are nice. and if you DO notice a larger interest in donations because of offereing prizes, then by all means keep doing it.