How did you get so many stones on F2P? I was going to do a video for it but my game was laggy and I didn't get much, except I was able to pick up a 5 star Rotos from the merchant. Yeah I agree that there are so many names of things that are kind of the same I keep mixing them up.
On the newer account, I never do IT, so they are just from Hydra and events. My other 2 accounts, I normally run IT every day. I try to save them for when there is a Path Event with something useful, so I dont pull them often.