I'm using construct for a long time but haven"t published anything on the arcade. As a programmer I also wonder what is the architecture behind the arcade.
Do you store all the games on own servers or external solutions? How do you manage the data (MySQL or directly filesystem for the games), what prog. language, server backend and so on.
I think it would be interesting to a lot of people to know how do you handle all it, because I think the traffic and data amount must be quite large.