The yellow stickers are also present in some Flock marketing materials, so I'd definitely recommend getting a good shot of the sticker.

And if it does seem to be a Flock camera, add it to DeFlock! (don't worry about if the images on the site to make sure it's an ALPR don't include one from Flock that looks like that, they only have images for two of Flock's fixed camera systems, the Flex LPR, and the Standard LPR, but Flock has other designs.)