I believe the idea is to make the companies who hold the purse strings (i.e. control) do something about it, which it looks like may be happening.
Yep. It's also more realistic for F1 fans to boycott advertisers, rather than the race (if they can't find an appropriate alternative).
We're getting mentions in the mainstream press and more importantly over 1300 signatures in four days. With three weeks till the next GP I think 5,000 is a very realistic target, with 10,000 not outside the realm of possibility.