I like the idea of the glade, letting go of some of the multiples you get (that don't seem to generate any interest in the trading area lol).
just to expand on it some more (depending on how complex the web designers of this site want to get lol), you can go to the glade a few times per day, per user (like, each user has 10 times they can 'explore' the glade).
each time, there is the possibility of encountering common pets, or released pets, that the user can adopt.
However, just to make it more interesting, there can be special lures the users can buy (my vote is in the shop or saloon with floryns, but I understand that the site needs to make actual money so the really good ones can be bought with jewels lol) that will allow the user to 'attract' the more rare creatures, or even shop creatures, from the past.
Sorry if the idea is too hard or weird to use, lol, just throwing it out there