Perhaps understanding the problem deeply, thoroughly and putting yourself in the shoes of the customer insteading throwing a bunch of semi-random iterations over the fence and squeezing every last bit of data from the customer's private behavior?
Imagine if I buy tomatoes from the grocery store, but they run an A/B testing on me to see what the customer wants - may be I prefer the 85% ripe ones over 95% ripe ones, the farmers watch the reaction of their users as they cook and taste tomatoes in a live video stream from their customer's home. WTF, get out of my house (browser). It is my private property. I just want a goddamn tomato (send an email or post a photo or read news).
What happened to user's privacy? That last mile optimization is bothering me as a user.