[captainchaos]

I disagree. Considering the way likes work on platforms like Facebook, by Liking something you are advertising your interest in it. Viewers of your profile can see (and judge) the things that you have liked and also you create a story visibls to you friends in the ticker when you Like something. I know some of this is inherent to Facebook, but similar features likely exist on other platforms as well.

Capping it artificially stifles users who may actually enjoy photography more than others. A critic would presumable like photos far more often than a casual user.

[perlpimp]

I agree, saying likes are a(or resemble) currency is dubious preposition at best. FWIW likes as an idea is distorted, there are no unlikes so meaning you have no likes proposes that you have dislikes - except that you don't have way to measure disapproval. Consequently if you would be deprived of likes it would not devalue your work in most but most of the extreme cases.

Likes don't deliver any serious value to all but the most popular of internet celebrities. They do feel good though but you can't pay rent with likes.

IMO YMMW.