Marketting must be good, I agree. I use (d) Acclaim images and sold one picture for $300. (1 of 100 shown). That's all for now. The client is inteligent enough and knows in advance what is appropriate for him. There is no good/bad picture. At most it is not suitable for the concept.
For example, take a new restaurant owner looking for suitable wall hangers in the restaurant. He can search the stock images data base for food, forks, tables with beautiful people sitting, or dim light with candles and wine on top of the table with flowers...
You may be great prized street photographer, but the client's mind is far away. So, you go very much digital for closeups and check you light condition promptly to be sure you are good for the concept. Then you can use RF camera for the intermidiate distances for people and finaly use your big zoom
to catch mood with singles near the table.
But you are not good if the one in the street can say "I can do it better". NO!
Your image must be stunning in performance. So simple and so on target, that any viewer will be impressed and not able to open his mouth.
The image can be sophisticated, but clear to the end