Okay, updates.
A) None of the striking workers appear to have called on consumers to boycott Amazon during the strike.* So proceed in the way you believe best supports the striking workers.
B) sunglasses
C) The strike, currently, involves workers nationwide in Germany** and in Shakopee, MN, USA***. Other US Amazon workers do not appear to be striking.
D) The US strike is focused on free one-day shipping*, so--
* https://www.theverge.com/2019/7/14/20692187/amazon-strike-protest-workers-warehouse-employees-conditions-prime-day-2019
** https://www.reuters.com/article/us-amazon-germany-strike/amazon-workers-in-germany-to-strike-over-pay-verdi-union-says-idUSKCN1U90NZ
*** https://lifehacker.com/how-to-support-the-amazon-prime-day-strike-1836309627