I definitely look at the pictures posted here. Have to laugh though with how many guys take like 10 shots in a row of their exact same erection.
That does seem to be a common theme amongst the lesser creative when it comes to taking nude photos, but particularly dick pics.
Whenever I've posted pics online, whether my own, the wife's or both of us, I always tried to make each one different and never with the same angle, view or pose twice in a row, variety being the key to hold someone's interest. As much as I like to look at tits and vaginas, seeing dozens of close-ups without hardly any other shots or parts can get boring.
I think some of these guys do it due to the Instagram Effect, where young women have traditionally posted countless Duck Face photos one after another and think that's somehow going to get them the most attention or likes.