Some people have been boycotting target for a while now, but people have also been boycotting walmart for longer. Both companies are still around and have billions (tens and hundreds of billions) in assets. Enough people will keep shopping there to keep them in business. If either company ever does die off it won't be because of a boycott. Even where boycotts have a measurable impact on their earnings it's not as if it matters. Do you think the CEO of either company would have to meaningfully change their lifestyle one bit if the company makes make a few billion less one year? They wouldn't feel it even if they never got another dime from their company again. They'd still be able to live out the rest of their lives without ever worrying about money. They have no reason to fear a boycott.

It doesn't stop me from avoiding shopping at them both, but I know they aren't losing any sleep over it and I don't expect they'll suddenly stop putting profit over everything else.