You misunderstood my meaning of "contribute". Maybe a word picture will help you understand:

A certain guy, let's call him Charlie, finds out about a group of guys who hang out in some guy named Will's basement, smoking cigars and talking about different things, one of them being the cigar shop business. Charlie wants to go into the cigar business so he decides to go down into the basement and ask those guys how to do it. He walks in, see us all sitting there in our comfy chairs puffing away on our cigars, drinking our scotch, and listening to whatever it is that Mark has provided that week. Charlie asks us how to start a cigar shop and we all look at each other and ask if anyone knows this guy... nope, nobody knows Charlie. Sorry Charlie, but good luck with your venture. If your car outside has a flat tire we'd be happy to come up and help you out, but you'll need to seek your business advice elsewhere - this isn't Will's Business Advice Basement.

Alternatively, another guy, let's call him Jackson Dangerfield, finds out about the group, wants to start a cigar business, and decides it would be a good idea to hang out with some other guys who may have experience in the cigar business. He walks into the basement, introduces himself, is handed a cigar and some scotch and pointed to the available empty chair. After hanging out for an hour or two he starts to ask the guys about the cigar business, they offer whatever advice and information they are able to provide. Jackson returns every week to hang out with his new friends, learning more about cigars and the cigar business and one day opens up his own shop.

Maybe later if I get the time I'll upload some pictures depicting these two scenarios.