It should be quite easy for developers to tell. I am paying customer (>500$ so far). Just run a simple report showing % of time paying players spend online playing foundries (or making them) I absolutely love foundry. It's the best thing ever in this game.
I loved this little questie :) Funny references, and NAMED KOBOLDS. How scary is that? There are some problems with item placements inside home, it is doable but reqiures lots of camera-angle fiddling.