Why?
> And there appears to be a lot less protection for you as their customer.
They have EU banking licenses (depending on where you are a different one applies to you), but they are a regular bank with all the protections that includes for a customer - if they go bankrupt, your money is guaranteed up to a certain extent; they can't just close your account and keep the money like PayPal do, etc. etc..
What do you mean? They provide banking services, they cannot do that without a banking license to do it under. They used to only have one, in Lithuania, and use it for all operations, but now they have a bunch more and the most appropriate applies (e.g. I'm in France, and I'm under the French one).
When I duckduck the question, even revolut has this in their FAQ: https://megous.com/dl/tmp/bbebf0d88acb54d8.png
It's possible to have a license and not use it.