I have been getting at least two emails per week from people living in other countries (namely, India) and also many local job seekers who quickly and half-halfheartedly click the "add contact" button and think that is enough to get me to accept their invitation on LinkedIn. The more emails I get, the more strict I am about who I add on my LinkedIn network. I am not being rude, I just want to reward those who understand that in order to get someone's attention you have to show that you care about who they are and realize that they don't know you. It is similar to men asking for a girl's phone number in public without even saying hello first. Is she going to say "yes"? Of course not! So, you should be spending time writing thoughtful introductions and complimenting someone on their work or the company they work for, etc. It only has to be two sentences long, but it shows you are a real human on not just someone with a finger that can push a button. Not a lot of people know about this tactic, apparently, and my email inbox in proof. So, if you want to get real results in your job search, start writing thoughtful introduction emails and make sure they are directed at someone who has a potential of helping you get hired (don't send a LinkedIn contact request to an artist if you are a programmer).
The article: https://www.linkedin.com/pulse/interested-ea-here-couple-tips-carrie-fowler?trk=hp-feed-article-title-comment
-Ken