If you’d like to point out one single item on Photodune that consists of an ‘old movie’, or one that was created using a super computer then I’d be inclined to believe you… but there aren’t any!
Old movies may have succeeded, but that doesn’t mean they would get approved on Photodune. Flared trousers were very successful back in the day, and have seen the occasional resurgence in following years… but try uploading a pair to the marketplace and you’re not going to get very far.
I said a decent DSLR with a good lens. Unfortunately, a vacation camera is unlikely to be a decent DSLR with a good lens… and it’s very unlikely you could pick up a decent DSLR with a good lens for $300.
The point is, you don’t need a super computer to get an image accepted on Photodune. But even if you did… is that discrimination? Kind of, I guess, but does that mean they should be accepting stuff shot on phones, on vacation cameras? Should they accept images that are blurred, full of noise etc… just so that they’re not discriminating?
Should they accept GraphicRiver items made in Paint so as not to discriminate against people who can’t afford Photoshop or Illustrator?