One of the thing that must be taken into account is that fidelity is a way for companies to gain access to personal datas on consumers which is a great thing economically speaking for them.
A system like Gatcoin would prevent the collection of personnal datas by the companies or not ?
I think it will be a token issuer choice? Maybe with some of them you will just scan a QR code, with others you must register on their website, enter a code and redeem your tokens. Diffrent types of tokens will have different "modus operandi", you can expect a registration with your name and all for loyalty programs in my opinion