I wonder about this. I feel the same, but wonder if it's true for everyone? I kinda assume it must work some of the time, otherwise they wouldn't do it.
This maybe the next level wikibuy/honey ... Intentionally abandon carts to get more % off to undermine companies that do stupid things to get customers.
Yeah, I do that all the time when I'm dealing with real humans. Get a quote, then let them know you're considering it along with some other options, and hold off for a day or two and the human will often get back to you with a discount.
Sometimes works with rental apartments as well.
It's almost a perfectly scriptable thing -- I sometimes wish Google Assistant could do this negotiating stuff instead of reserving haircuts.
Probably these scenarios occur far more regularly than somebody rules out buying from a store solely because they received a marketing email concerning an earlier order they abandoned.