The Shutterstock comment[0] is dispositive: one of their alleged photos of alleged human employees is a verifiably fake image, with a background that matches a stock photo. (2,2 on their "Meet our Team" section, "Ricardo Mesía / Marketing & Comunications". Does not exist).

[0] https://news.ycombinator.com/item?id=42804081

What I see here is a big Opus Dei family full of business contacts but no technical background. I'm not on front of my keyboard right now, but the Pasquín Echanove family is big and have been controlling parts of Spanish (and US) banks. But I don't think they have any future on this. I wouldn't give them a single Euro.

Can they run obnoxious Android banking apps that refuse to run on rooted phones etc.

I'm not sure I'd call anything using libhybris "Linux-based". Their low-level elements come from Android with all the problems that implies, including Android being Linux only in the most irrelevant technical sense.

What makes it not-phone-capable? The non-s variant powers the "open source laptop" that was on the front page a couple of days ago: https://news.ycombinator.com/item?id=42797260

Well, the Quintus is an option, but I wouldn't call the Nexx more than a render or a mockup right now. ;)