If Facebook would ask me, I'd opt in to tracking, as I prefer targeted ads over untargeted ads. But I'm too lazy to manually enable that setting, so I'm in 96%.
I'd argue theres good reason your brain is raising red flags when you are asked if you want to allow these manipulative processes to continue.
With due respect, and you are completely entitled to your preferences, leaks are very common and a big problem, often reported on HN.