We’ve also identified signs of water damage on your roof, which was last replaced 22 years ago according to public records. Our local affiliate will provide a repair estimate free of cost, and we’ll throw in a discount on the car detail.
Regardless, insurance companies are big customers for similar reasons. Recognizing swimming pools in imagery is tougher than you'd think, but a classic thing (and real) that gets brought up is your insurance company raising your rates because you put in a pool and didn't tell them. Insurance companies would love to (and sometimes do) detect that from satellite imagery instead of boots on the ground.
Either way, those are big companies / big contracts, rather than individuals buying imagery directly.
Sealing will leave you with a pure white roof for about a month or two. Powerwashing will leave you will light to medium gray. They'll turn dark gray to black within a few months in the parts where the water pools.