Regardless, the “pedantic” argument against the headline is only a thing if you’re not allowing for the evolution of language, it’s actually just being a snooty language snob given that language does evolve and the usage of the headline aligns with common standards these days:

Decimate strayed from its “tenth” meaning and nowadays refers to the act of destroying or hurting something in great numbers.

• https://www.merriam-webster.com/dictionary/decimate

See also definition 3b of the same source.

Anyone have a link that’s beyond the sub-wall?

Tap to pay was pretty well established when they went with scan to pay, they just hoped the Walmart name was large enough that they could cut out all the middlemen inherent with traditional payment processors and keep a bigger piece of the pie. Specifically they were in a spat with Visa over merchant fees at the time so they wanted an option that allowed them to cut Visa out of the picture. They thought that having their own scan to pay system would allow them to do that, but they eventually reconciled with Visa and got the merchant fees discount they wanted and that aspect of the scan to pay system sorta dropped out of focus.