I am a buyer and a seller. However, I don't buy many images. I estimate that it's between 50 and 100 per year. On demand at Adobe Stock.
In fact, there are subjects where it is very difficult to find good image material because they are niche topics.
Example: A customer specializes in basement windows and concrete light wells. However, the images required are not intended to advertise the basement as a basement, but as additional living space. There is hardly anything to be found. But it's also not worth producing this for Stock because I don't expect any significant sales figures.
Nevertheless, I bought images on this topic and edited them until they met the requirements to some extent.