Sadly, zero repercussions. Who will sue them? Individuals cannot, the process of law is long and requires substantial money. Government is difficult enough to get involved, and will soon lack resources to intervene or impose fines.
I'm not sure if that's the right take: the Americans with Disabilities Act is maybe the most plaintiff-friendly tort law in the US. There's whole law firms specializing in finding viable plaintiffs to take on contingency (i.e at no cost).
Amazon is big enough that they might even be able to get a class action lawsuit going, to be honest. If enough people started coming forward about disability discrimination.