In theory the use of a cryptocoin should be cheaper for the customer, because the merchants has no counterparty risk to fraud!
In practice no merchant use this advantage to get the eayes of the crypto users. You should calculate how much cheaper you can offer your products, if you have not to pay : VISA card, fraud buyers etc.
If you have the number now we can talk about to find a nice pricpoint to bitAsset buyers.
Lets assume you can now make it 10% cheaper for buyers in general, this would let me think as a buyer "What the fuck is bitGBP if i buy with this here?".
If you want to use it as a kind of coupon you are fine with the regulation and you can think about it as a first step for a new business. There are a lot of companies out who are selling coupon books to people, because you will get promoted. Now you can start to sell your UIA in the beginning, because if you use them you will get a discount on my purchases. If you find more businesss much better, because now your
coupon is more useful and will promote your and the other businesses for free.
This would be my thinking to get this started!