What is the main purpose of profile submission

[Steve Smith]

Profile links can prove as quality backlinks to improve your PR and SEO. It is also one of the simplest way to build backlinks. Always try to make profile in high PR websites and you will get quality backlinks.

[kasnake]

Profile submission can prove as quality backlinks to improve your PR and SEO. It is also one of the simplest way to build backlinks. Always try to make profile in high PR websites and you will get quality backlinks.

[ProSence]

As we need multiple methods of link building so we have to use profile links to but don't use too many it would hurt your ranking.

[DarrenLois]

You can get backlinks from profile. and it can also help to increase the website ranking.

[jmogli]

As we need multiple methods of link building so we have to use profile links to but don't use too many it would hurt your ranking.

Agreed with Prosence.. Google has already updated its algo for profile link spamming. But nowadays I seen many forum profile pages is not visible till we dont sign in so do you think that those profile links would be any use in Google. Do Google crawl those pages and links?