I'm thinking of moving to 500px instead of flickr... why? I used to log in to flickr via a 'spammy' gmail account, however flickr now seems to be forcing you sign up for a yahoo account. It's annoying to have another account to remember and manage. That in itself is not a big deal but when I try to sign up for a yahoo account, I need to register with my mobile number. I'd rather not share that information with them unless it's absolutely necessary. Maybe it's a mild case of paranoia, but I feel that these big corparations already have enough information about us. So any downsides to moving to 500px? Seems like another popular platform with photographers.