Differential privacy is more about preserving privacy from consumers of data (e.g. a user running a query) -- it doesn't have guarantees around what sort of dat

Differential privacy is more about preserving privacy from consumers of data (e.g. a user running a query) -- it doesn't have guarantees around what sort of data is collected (e.g. google could expose a differentially private API, but internally they would still have all of your data). Edit: after considering it more, I realize you can certainly apply some mechanisms from differential privacy to play a part in the data collection schemes.