PrivatePropery <- was a website in South Africa setup in a market where all real-estate sales was controlled and gate kept by real-estate agents (assisted by Lawyers, various government bodies and even legislation), and its purpose was to allow "Private" individuals to put up their own properties for rent or sale.
Predictably, it eventually got take over by real-estate agents that posed as "private" sellers, and then that caused the entire site to support "Agents" as a concept and here we are. Today, you will hardly ever find a private individual on there and the company makes no effort at all to root them out. The agents just spam all their listings, lie on the metadata for properties, add duplicates, make zero-effort postings and use skew photos, the works.
Another example if you will, AirBnB. Taken over (I exaggerate a bit) by management companies that own many many properties and allocate an "agent" to oversee each property. At least here in South Africa, that is. Might not be that true in other countries, but it's on its way there. Mark my words.
Or more:
Pricecheck <-- Another South African website. Still claims to be a price-comparison website, but is really just like Google shopping, that doesn't do any scraping of prices, but simply "partners" with websites that give it a kickback after a user purchases something.