Yes:
* During the strike, show solidarity by not crossing picket lines. Don't use the service, and don't patron the business for the duration of the strike. This is because during the strike, the workers that are filling in for the strikers are scabs and crossing the picket line.
* Spread the news, their demands, and encourage solidarity with these workers.
Strength is in numbers and solidarity. When that breaks down, the movement breaks down. It's why many States and companies do everything in their power to prevent the wage-earners from organizing effectively.
the workers here are not unionized. it therefore isn't a strike. we can safely assume that not all workers are participating in the walkout, and those that don't presumably still want work (orders) to come in.
i understand your pro-labor position (i am also pro-labor), but because this isn't a union effort, ie voted on and carried out by a singular work force, there aren't scabs. there are those who agree and those who don't. applying a disparaging label to those who chose not to participate is promotion of a one-sided message; a political bias.
also, wrt the amazon part of this news, it's a single warehouse in NY, and given that it's now 3PM there, and there is no news story of an actual walkout, it's safe to say that the effort fizzled.