Is that really so much different than just sticking a button there and then if you don't want it, you remove that button? If they make it opt-in like you sugge

Is that really so much different than just sticking a button there and then if you don't want it, you remove that button? If they make it opt-in like you suggest, then a good number of casual users will not understand, because they can't try it without opting in, and therefore ultimately not opt-in, even though they would probably like this feature. (They've had it in the Test Pilot project like the above and got a very good response to it.)