Hidden backlinks that require logging in. Do they count or improve serps?

There are backlinks that require loggging in so that the user can see them like some forum profile backlinks. For example, some website will say "You must log in before you can see this webpage".
My question is, does google able to find these links, do they count, or should I even do them?

My theory is that if I can see them in my browser then google spider will be able to crawl them too.
However, another theory also is that a web spider can't log into a website so it will not be able to see the same webpage that a user that is able to log into.

Anyone know what the deal is?

Thanks in advance.

Hi,


Google doesn't see these backlinks. ��

if the spider can see it, they are good... if the spider can't see it, they are useless! Just try to access to them via http spiderbot emulator and see if they showing or not