You need to show nexus mostly for tax related matters. If you are slighted by a foreign company you can still receive a judgement against them or their functionaries, and in extreme matters the company and its distributors would start having issues with CBP and with their banks.

The damages required for such issues can be quite high, $50-75k for federal court filing, but existing precedent would allow you to go after distributors in a local court for a lower amount.