Just an optional search filter to exclude models without photos would be nice. No need to completely ban designs that have never been printed.

On the other hand, in an ideal world I would expect the number of likes to reflect the overall quality of the entry, which of course includes aspects like photos and a nice description (which is important, too), so you just need to sort by likes. I'm not sure — are there many designs out there without photos, either own or from makes, but with lots of likes? If so, why?

Literally shitposting

I'd say you loose weight. Imagine opening a bottle of Coke, the gas comes out, and the whole surrounding is covered in Coke sprinkles. I suspect the same happens when you fart. Your scale may have high precision, but your farts don't.