Yes. I had it more than once where I purchased an item from a store and, about 10 minutes later, I received a coupon for a discount at the very store I just made the purchase. It happened to my wife as well.

After the second time that happened, I disabled location in my phone settings and only enable it if I have a specific need for it. I have not received any "spontaneous" coupons since disabling locations.

> even if they would sell accesss to place an ad to "visitors who have been at this geographic location recently

So if I click on the ad, the company behind it knows I was on that geographic location recently. This is how Google leaks data.

The example is to illustrate that people are fine with giving away their data. Google Latitude no longer exists and I don’t think Google sells data like that, they analyse it themselves. But other services do.

I’m not sure if Google would sell user’s location data to advertisers since Google is an advertiser. But they definitely record it for themselves, and the government has access to it as well.