[alexbilbie]

Trade barriers won't really affect digital service companies as they're not moving physical goods around.

Digital services are affected by other types of regulation though which won't really change as a result of Brexit (e.g. if you're a British online accounting company selling a version optimised for German companies).

[jimmytidey]

This is an untested assumption if ever I saw one.

[notahacker]

Regulatory barriers in many areas will affect companies much, much more than a simple fee to move goods