Wouldn't funding this be in the interest of mid-sized companies? Albeit it's not likely that they'll be targeted it seems like an awfully cheap insurance policy. By "they" I mean "a company".

Seeing as they are a potential target for the next six years they'd effectively pay 20000/6 which rounds up to four grand a year that has to be much cheaper than the legal fees they'd incur if they were targeted.

Split that cost with a few other companies and it hardly costs a thing in the relative scheme of things. Makes for a good PR opportunity as well: "We will not sit idly by when others are bullied into paying licensing fees on such a nonsensical patent, effectively robbing the cradle of new businesses"