I would pay the lower rate indefinitely if they just charged that, but I'm not going to play games.
Yeah. A/B tests have no way to prove the value of customer loyalty to a fair deal, so nobody knows how to implement it anymore.
There's historic evidence - Coca Cola was infamously still 5¢ long after everything else went up in price, and it worked out.
But everyone is obsessed with "engagement" right now.
This was quite eye-opening for me, when I discovered it.
I've met Chief Information Security Officers who I wouldn't trust to pick my antivirus product.