Last year I started to upload thousands of images to Alamy. Now I have over 23.000 images online (two pseudos: niceprospects and niceprospects-prime). My portfolio consists mainly of Southeast Asia (65%) and some European countries (35%). Subject are general travel photography (landmarks, landscapes, people, etc.)
My total number of sales were only 17 with a gross turnover of 1.000$ since the beginning of this year. I find it pretty depressing. My total CTR is also only 0,20! Although I carefully keyword.
As has been stated before I do not think that there is a general rule. Subjects,