Is LinkedIn useless?

It is a bad market. Wait for things to improve

Some time back layoffs happened at Linkedin and the people who were let go by the firm were finding it tough to search the job through LinkedIn.. just saying… !

this system worked for me very well to get calls.

Go to LinkedIn.
In search, put "<job title> hiring".
Select "Past 24 hours" filter.
Find a post you like, research company.
If you like it, apply in their given method (email, link etc).
Send a connect request with note to the person who posted the opening.
They may accept or ignore but they will see your profile.
So keep a stellar profile, highlight wins, portfolio and achievements.

This method has advantages:
You'll definitely be among the first applicants. You'll jump ahead of many lazy applications.
You're directly getting the eye balls of the recruiter (a person instead of a computer).
If they accept your connection, share your phone number and get the ball rolling.

After that it's your communication skills and talent. Good luck my friend.

Is linkedin useless?

What else?