[achillean]

I think it really depends on the type of product that the business makes money on. If one of the main products is data then I'd wager their API will have significantly more information compared to their website. If they make money via the website then yes, they're less inclined to spend resources on the API.

All of our own websites are built on-top of the same public API that everybody else uses and scraping used to be a nuisance. It was also confusing because they would be able to get more data using the same free account just by using the API instead of scraping. Exactly like the OP mentioned we only show a small number of properties via the website but most scrapers never took the time to actually compare API vs website.