I definitely joined bunq being part of group number 3. I loved the concept of a bank that is run by nerds instead of bankers, since banking is pretty much all IT nowadays anyway. This concept was quite unique imo.
Hearing about all the strange businesses and bonus scandals banks like ING are involved in, its a great addition that bunq is a ‘green’/‘honest’ (however you’d like to call it) bank. I think it’s a great selling point that attracts people from ‘group 2’, even though I think that’s a less unique concept in NL.