well as far for the likes you mentioned,one of my pics on 500px had many likes,went into popular catagory,and after a little while it was sold as a prime.so i guess the too many likes and favs and comments helped a bit. 

hi i am new to this forum and quite happy i found it.anyhow i ve submited my pics   to some agencies< in ss they rejected me so i didnt bother with them  for second time specially of all the things i ve heard about them>.and then i found the Eyeem app for the iphone and the Eyeem market I  used it for some time now.and i just wanna ask if you submit your photos there as well. One thing i dont like about the eyem is that when you add your photos to their market then they are not allow you to submit the pic anywhere else.so some of my best sellers images i havent put them yet becouse of that
But the thing i like is that they accepted all of my pics so far while sites like dt and fotolia make it diff for me to have a big portofolio there becouse of their silly rejections.
But i was wondering what are your thoughts of this site.i havent seen a thread for eyem here thats why i am asking
thanks