I don't know a ton about GDPR, but the article makes it look like it has less to do with Instapaper (aside from risk tolerance) and more to do with the ambiguity of the law. Some relevant quotes:
> it’s more than likely to be the GDPR’s data subject access request, which allows any EU resident to request any and all data collected and stored about them. As The Verge reported yesterday, that’s causing companies trouble because it’s not entirely clear right now what information residents will request, what format that information needs to be in, how to locate it and package it, and whether new infrastructure needs to be created to manage this request pipeline. Personal info is a somewhat nebulous concept, and the fact that experts are describing the GDPR as “staggeringly complex” is not making it easy to cover all the bases.
> It’s clear that few companies, if any, will be 100 percent compliant when the law goes into effect. But because the fines are so steep — violating GDPR will cost a company 4 percent of its global turnover or $20 million, whichever is larger — no one really wants to be caught non-compliant. So that’s why companies are rushing and, in the case of Instapaper, literally shutting down.