[aspidistra]

Related Github profile lists location as "La Plage Digitale, Strasbourg". Googled that + Appsdeck, discovered La Plage Digitale is a coworking space. Found a couple of articles tagged Appsdeck, which led me to Yann Klis:

https://twitter.com/yannski

It shouldn't be that hard. An imprint / contact details page is a minimum requirement for anyone offering a service such as this for money.

[yannski]

Imprint and terms of service is the minimum and we know that. Technically we don't charge for money ATM.