Let me explain: they were early to introduce a cheap e-bike with a nice design (the S3 came in at €2o00 + €400 3 year service). Cheap is of course relative,but at the time most reputable brand ugly as hell bikes sold for €3000+.
Where they went wrong is that they took minimalism too far. The combination of automatic shifting (and there are no buttons), absence of a pedalling force sensor (cause cheap) and an internal gear hub (can't really shift under load) is basically a recipe for disaster. Combine that with general lack of QA and all of a sudden you have a company burdened by it's repair costs almost to the level of bankruptcy...