What do you think of my portfolio ?

yes please let me know, thank you.

true.

Yes, way too many (almost) duplicates. This will only hurt your chances.

If you have an idea that would get 100 sales, those sales might now be spread out over 10 almost identical images, and they would all eventually disappear in search.

If you only kept the very best of those images, that one would get 100 sales and rise to the top of the search results and live a lot longer.

Shoot timelapses or hyperlapses instead, man...
I think it is fine to have 10 or even more photos of the same subject, but only if they're  substantially different from each other. Different angles, vertical vs. horizontal, close-up vs. wide, etc. You're not doing that, your similars are more like 'clones', the differences between them seem to be purely random and usually don't seem to be a result of a creative process.
Cheers!

Guess they didnt really want to hear what we think after all. 

Did his portfolio disappear? Or just a link to it?

Probably up to no good.