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‘The tyranny of apps’: those without smartphones are unfairly penalised, say campaigners
(www.theguardian.com)
This is a most excellent place for technology news and articles.
I use a loyalty card pretty often. It's just that it is almost always another customer's card) And in case this is not available - a barcode of some rando's loyalty card I found online, the valid ones are often easy to find.