[Tuj] No. As a proud shopper at Auchan, though, I have a "Waaouh" card. Because the savings make me say "Waaouh!". Obviously. Yes.

Our local supermarket advertises something it calls a 'Price Commitment'. Since these signs disappear as soon as the so-promoted product increases in price, one has to wonder to what extent this counts as a commitment.

[rab] With the "Whoops!" button, could one undo a winning move? More pertinantly, could one test several options until finding the winning move, if unknown?

[Tuj] (i) Yes and no. (ii) I think so, but would it really matter?

[rab] Yes and no, eh? There's cards close to the chest. I'm too timid to go test it ;)
And regarding the second, in theory, with patience, one could knock off the likes of Mystery Crescent single-handedly.

Yes, but you could do the same thing, albeit more publicly, without the Whoops feature. If anyone ever suspects foul play I can always look at the logs.

I've just acquired a niece - what's the appropriate Unclely response? (Other than a brief note of congratulation).

[rab] No idea!

[rab] Go make a visit, if plausible, and be friendly towards. No point in sending gifts at present (lol) as too young to appreciate them.

[rab] A congratulations card. If you want to send a present, something for the parents to enjoy, rather than for the child, is better received in my experience. As Projoy says, the sprog is too young to appreciate anything, and it's the parents who will be feeling more in need of TLC, and perhaps a little neglected.

(should you doubt my credentials to offer advice, btw, I speak as one who was en-neiced earlier this year).

Visit no-go; parents live in New Zealand. Point taken vis a vis gift for them.

(rab) Can't remember; my nieces were born in 1974 and 1976. It's about time, therefore, that I became a great-uncle and if I were to I'd have a natter on the phone and send a nice card. I wouldn't visit - they'd have enough to do without me getting in the way.