No one is a "paying customer" on these message boards--they are freely available for all to use. They are here for posting queries and data and that is exactly what is being done here.
It is completely up to you what you choose to use or not use, but it is also completely up to a poster what he chooses to post within board rules and guidelines and that is exactly what is being done. There is no spam involved.
The links provided in the posts take you to freely accessible photos.