The very luxury oriented nature of EA makes it a prime target for a protest of this nature --- no one NEEDS their services, so they must ostensibly rely on customer satisfaction and loyalty in order to remain successful. And YET they nearly seem to take utter glee and satisfaction in screwing the very customers they rely upon for their success over and over and over again. Blasting them down in a poll like this could potentially be effective because indeed, people with the free time to vote in polls on the Internet are likely the same people who are going to be spending lots of money on EA products (and less likely to be the kind of people worried about their house foreclosing).
People angry at both companies might still have voted EA because EA should be behooved to listen to what is essentially a good portion of its consumer base--in moreover in a medium that is likely to reach many other members of that same consumer base. If they looked at the vote from the perspective of, "Even if either is unlikely, which company is more likely to re-examine its practices if they 'win'?" BOA definitely won't, not from something like this. EA should. (Whether they will or not is an entirely different matter, and likely proportional to how many people still decide to buy their products even when they are unhappy with them, which is an ongoing nonsense deserving of its own article.)
This isn't saying Bank of America and corporations like it shouldn't be held accountable for their actions, but that there are better ways to take action against them---such as pressuring Congressional representatives for no more bailouts and stricter reforms on corporate operations (as two off-the-top-of-my-head examples; there are probably better ones out there). BOA provides, relatively speaking to video games, an essential service. They are likely to be unaffected by an opinion poll on the Internet which is likely, largely responded to in the majority by the kind of people who sit around and play video games all day. Better to vote for the company the poll might be more likely to impact.