I shop there weekly. There's at least 10 of them within 5 miles of where I live, including the 3 in Salem, NH that's within 2 miles of each other on the same road.
And to be sorta on-topic, I like Polar's flavors the best, of the ones that are easily available in this area of the state. But when the pandemic hit, I started using a Sodastream Fizzi One Touch, which significantly cut down on the amount of seltzer 12-packs I'd buy. Even with the swapping of CO2 canisters with Sodasense, it's cheaper with the Sodastream.