It is all about saving paper and ink.
Maybe paper. 99% are thermal printers - there is no ink...

It is all about saving paper and ink.

Engaged?
Hope you’ve kept the receipt for the ring.
Quoting this a bit after the fact aren't you? I got married in August.

ThisIt is all about saving paper and ink.
Guess they didn't let you return the ring?
Shame to let it go to waste I suppose...![]()
I'm guessing you didn't follow the full conversation.
7 months ago people were ragging on me for splitting our food shopping in to 'Mine/Hers'
e.g. If I buy an expensive 4k blu-ray whilst at Tesco, it's not really right to make my wife pay towards it. Equally if she buys loads of stuff I won't eat (vegan meals or whatever) then she pays for that, instead of splitting it 50/50
They were implying this was bizarre and they are surprised she hadn't left me, and that I should keep the receipt for the engagement ring.

You get receipts in McDonalds now. When did that start?
Well unless you're keeping track of what you've spent, need it for accounting purposes, for expenses, proof of purchase etc.Papers receipts are pointless.
Never asked for one never wanted one.
Never ever used one.
Just paper. They don't use ink as such.It is all about saving paper and ink.
Went to Halfords for first time in absolutely ages for some bulbs and the checkout wife asked for my email address. I asked what for and she said to send my e-receipt. I stupidity gave her it instead of just saying I didn't have one (put on the spot, not thinking). Now I'm getting Spam from Halfords. Great.
When they started giving you order numbers.
I’ve noticed quite a few clothes shops ask for your email now to email your receipt instead of printing one. Probably why I get spam mail more than ever. It’s also Quite annoying standing there having to spell it out to them because they can’t understand what your saying.Would be hilarious having a rude or explicit email address name to give in just for a laugh.
Except they shouldn’t as marketing is opt in not opt out now.As you seemed to have worked out, it's a scam to harvest your email, and by extension, implied consent to be spammed. Tell them you want a paper receipt. Halfrauds and PCPants love this game as well.

Except they shouldn’t as marketing is opt in not opt out now.![]()
They are asking you to opt in. That's the point.