I don’t think this is the right argument, and I say that as someone who wants legislation to prevent such data from being accessible to federal agencies.
Those cases that WERE solved using Flock data could have impacts worth far more than $2 million. For example if one kidnapped child were recovered, what is that worth to the parents? What about to society, who can feel secure about their kids and also actually experience higher safety due to better deterrence? That’s worth more than the few thousand dollars you could say was spent to support that one search of Flock data.
Ultimately, the data is also only as good (and bad) as how it is used. If local jurisdictions use it to solve crime and to actually prosecute criminals (rather than letting them go) then it can be very beneficial. A lot of people are frustrated by criminals not being brought to justice. And obviously, if their privacy is lost, that’s a downside, but it’s not the sole thing to weigh here.