The problem with this approach, even if we ignore the problems posed by the network-effect, is that developers are strange people, they tend to like to host their own profile, to have access to the code behind the pages, to migrate their content using rsync and bizarre things.
Also, you're trying to get everybody from StackOverflow, GitHub Issues, IRC, Hacker News and all jobs-for-developers platforms to yours. I think it will be very difficult.
The problem with this approach, even if we ignore the problems posed by the network-effect, is that developers are strange people, they tend to like to host their own profile, to have access to the code behind the pages, to migrate their content using rsync and bizarre things.
Also, you're trying to get everybody from StackOverflow, GitHub Issues, IRC, Hacker News and all jobs-for-developers platforms to yours. I think it will be very difficult.