Are they specifically calling for a boycott, though? Or just striking? (Because if it's the latter, getting orders that go unfulfilled may actually help their cause.)

So what you're saying is we should order a bunch of stuff and then cancel at the first sign of a delay in fulfillment so amazon loses more by waiting it out?

No, what they are saying is, "ask the workers what they want, and do that. Don't make assumptions."

Bingo :)