[DrScump]

This happens all the time, but it depends on user ignorance or apathy.

Just shop using different browsers or devices. Use incognito modes for everything. Use multiple entry points. Use multiple loyalty cards (and don't intermix credit cards amongst them.

For a real-world example, I use 4 different Starbucks cards. Each gets very different reward offers, every time. Y

[thr0waway1239]

I don't disagree. If you have done this much research though, you could actually set up a little case study on this, write an eBook with nothing more than screenshots on how the price changes, and put it up for sale as something which will save people atleast $x per month. :-)