This one offers daily trading cards for finishing a discovery queue, and stickers for following a “browse by category” link on the main page and clicking the “claim” button.
Looks like the site is overloaded at the moment. Some things are not working quite right.
Wildermyth is a lovely combination of storytelling and xcom-style combat, with a genealogy system and chances for your heroes (and their descendants) to reappear in future games.