Want to Spam Your LinkedIn Contacts and Be Humiliated? Try FounderDating
Actually, I'm the CEO of FOunerDating and what's surprising is that no one has actually asked if this is what really happens.  We not only state (in white writing) on black backgroud) that "a message will be sent to your chosen linkedin contact) and let you see the message but it's also completely opt-in - no tricks where you can't find the "x".  People can choose to a) not send or choose who they send a message to. There is nothing sneaky about it. If someone doesn't read the line "this will send a message" there isn't much we can do about that.