The majority of the time in the US when the power of the state is expanded at the expense of the rights of voters, it's done by providing big optional benefits to voters, and starts out with strong privacy protections which are salami-sliced away.

Tracking people by their smartphones? Voters get smartphones out of it, and the state supposedly needs a warrant to track them (except when they don't). And they can always just not get one.

Tracking people's every purchase? Voters get credit cards, cashback, purchase protection and online shopping out of it. And they can always just use cash.

Tracking people's media consumption? Voters get free/super cheap ad supported media, the widest selection the world has ever seen. And they can still buy in stores with cash if they want.

Access to people's photos, no warrants required? Voters get great quality cameras on their phones, and free basic cloud backup in case their phones are ever damaged or lost. And you can always disable it.

An always-on microphone in every home? Voters get huge, incredibly cheap TVs with 4K netflix/Disney/whatever, incredibly cheap smart speakers etc. And the microphone only turns on when it hears certain things.

Flock's problem is they've done the big power transfer without providing the corresponding payoff, and too quickly.