One of the products I built was profitable because I sent a tweet to some guy, he answered, gave me the contact to some other guy that was in charge of purchase

One of the products I built was profitable because I sent a tweet to some guy, he answered, gave me the contact to some other guy that was in charge of purchases and he told me send me a proposal, which he later accepted. I would call that 99% luck, because I had done that before in multiple occasions but no one answered.