Couldn't the Chrome installations receive a request from Google that says "Do you want to try out a new thing?", and couldn't the Chrome installations say yes w

Couldn't the Chrome installations receive a request from Google that says "Do you want to try out a new thing?", and couldn't the Chrome installations say yes with a certain probability? The only difference I can see is that the subset of users that are guinea pigs couldn't be the same in each test (if Google wanted that the subset is always the same).