It's for the "more money than sense" brigade
I notice that the fuss seems to be related to the more expensive providers: Apple the expensive smart-phone, Waitrose the expensive supermarket ("Waitrose users really struggled, with 74.4 percent of customers taking to Twitter to vent their frustration"), HSBC the expensive bank.
But surely a visit to Waitrose is going to cost more than the £20 Apple Pay limit.
Anyway might a better headline be along the lines of "Some iPhone using Waitrose' customers disappointed by HSBC delay..."