I still need 15 Expansion Permits for my last 4 expansions. I'm trading everything whenever I can, but still at this rate it will take me at least 5 month to get all my permits.
An expansion permit costs 250 gems which I think is too much if I need 15. So I won't buy them.
Are there any other ways to get expansion permits? Are they rare drops from adventures or other things? For example from those treasure troves? I didn't chop them all down because I like them as decorations, but for a chance on an expansion permit I would do it.