Most informed and enlightened people agree that this is a terrible idea.
However, companies C through Z actively support this/don't oppose this shooting.
The Internet gets really pissed with one such company G. A grassroots movement pillories G. Thousands of people donate time, passion and money to this effort. Amazingly this works and G's revenue plummets.
Meanwhile, A shoots B.
Consistency is good, especially when it's applied towards geek-centric companies that can be immediately impacted. GoDaddy's about-face here was more or less within 24 hours of being put in the crosshairs. Their capitulation sends a very strong message that they didn't think it was financially worth it to consider to support SOPA - because if the boycott wasn't having any impact, why would they change their tune? Other companies will take a look at that and realize that if the largest registrar in the world can be pressured through consumer action to pull a full 180 in under 24 hours, that it's going to be risky to support SOPA.
Any way you slice it, this is a significant win for SOPA opponents. It's a battle won, not the war, but it's a win nonetheless.
This was a good excuse to get the hell off of godaddy.
D-Z take out C.
B has a better chance.
Simple as that.