profile backlink from same platform?

hello guys, i have a question about if the profile backlinks are from the same platform, will it still works?
for example:
http://steepster.com/
https://www.quora.com/
http://about.me/
http://www.dailystrength.org/
https://storify.com/irenehauser308
http://www.stumbleupon.com/
https://soundcloud.com/
http://disqus.com/
https://issuu.com/
https://www.coursera.org/

profile backlink from same platform?