See this link for more information.The Humble Indie Bundle experiment has been a massive success beyond our craziest expectations. So far, 138,813 generous contributors have put down an incredible $1,273,613. Of this, contributors chose to allocate 30.85% to charity: $392,953 for the Electronic Frontier Foundation and Child's Play Charity.
Why wouldn't something like this work for an outstanding developer like Panther Games? I'm fairly certain they won't come anywhere near these kinds of sales totals using their current distribution and pricing model.