The only way you could start and then develop such a network is if you read other reviews and engaged with them. I am not suggesting you always write...
From my experience it really depends on how much they want to kiss you so i could say someone who kisses me nice but then might not want to kiss you...
I did busisness & marketing in college, went into a civvie job that had NOTHING to do with either topic, so I might as well try to put it to use here...