What is the "S" word on LInkedin? S stands for Spam. Don't be that person that spam others. This morning I got a connection request from someone who wanted to connect with me. And their note said "I will do Facebook marketing, fix ad account issues and run conversion ad. If you want to hire a freelancer then feel free to knock me at". Obviously this person did not even look to see what I do for living. This is just one example of what not to do.
Please get to know someone before you invite them to buy something.