This is a great question to use because how many of these people have given their smartphone location permissions? Google knows when they speed already.

How many hobbiests running miniature train sets in their garage have monetized those train sets? How many backyard gardeners sell their crops.

In most cases people who choose to develop and administrate an instance of their own are largely just hobbiests of another type. Sure it costs them some money. Many hobbies cost money, it doesn’t stop people from building things or growing things for fun.