Assuming you could make it work, then of course, yes it would be effective. Voting with your wallet works, we know this, so orchestrating it formally would wor

Assuming you could make it work, then of course, yes it would be effective. Voting with your wallet works, we know this, so orchestrating it formally would work even better. If you had a group that could tell Google they control 20% of their income, for example, then Google would definitely seek to keep that group happy. But as others have pointed out, you really just created a government or a consumer group, and the creation and maintenance of that group is a non-trivial challenge by itself.