One typo jumped out at me. But this is just a proposal, and I agree with a lot of it.
I note, too, that where there *is* text, it's very poorly written. (Perhaps English is not the writer's first language?)
Using smartphone apps to leverage instant GPS, camera and internet access is a good idea. Make the register- release-catch process simpler. Not keen on QR codes, though. They can be manipulated to send users to unknown sites. Having a barcode that feeds into a proprietary BC page is fine. No hacker can subvert that.
The symbol. OK with the update, and aiming it the other way. But not with losing the diamond "caution" shape. That's half the point. It's like a deer crossing sign.
The site needs an update or it will die. New tech - hell, this is existing tech that Geocaching, Ingress, Pokemon Go and many others already use - can streamline the process. Integration with partners can add value. The LFL movement is an obvious candidate.
Those membership numbers are meaningless, BTW. Strip out those who haven't been active for years, all the accounts with one or two - or zero! - books, and there's not that many. Lots of books registered, sure, but the reality is that most disappear and are never heard from again. A few great stories of survival, but they stand out for rarity.
Keen to see what is going to happen. We cannot continue to assume that a few people will dedicate their lives and fortunes to providing an essentially pointless service for the entertainment of a couple of thousand freeloaders. Yeah, we buy wings now and then, but that's not paying the bills.