No idea whether these ideas would work or not, but it may help fill the shortfall left over following the appeal for donations and the subsequent use of ads on the page.

Sponsored pages - within an operators thread, sponsored links to their webpage.
The benefits of this, are pretty obvious for both parties.

Raffles or competitions - This could be via 'bids' or purchase of virtual tickets and a prize could be offered to the winner.
I have no idea if this contravenes any specific laws/legislation.

Obviously there are a number of people on the forum, who have contacts within various organisations and operators. I am sure a quiet word here and there, could lead to implementation (certainly the first suggestion) and a flow of funds to the site, that may or may not materialise under the current ad campaign.