Tuomas, no it is not the other way around, you are wrong here.
The answer is not so simple, to say "people post too many photos".
When this site here started, there were just a few people posting photos, and digital cameras were not so common yet. Also, shipspotting was not so common yet. This site has grown immensely during past few years, not just because members post what some think "too many" photos, but as well there is an increase of shipspotters from all around the world in general! Remember, when this site started, even internet was not something everyone had and used
So, it does depend: What does this site want? Many shipspotters who upload a certain number of photos? That is fine with me. But, increasing number of members? That means also more photos.
It does also depend on, how much the owners want to invest into this site, or if they just want to run a badly repaired car.