Freeloader

An entity of any kind that receives unauthorized benefits such as candy & inventive ideas, through methods of any kind such as deception & duress induction, then uses it for themselves and their distribution of recipients. Or put simply, one who receives without permission of the originator.

Hi, there are many rumours about you.
Most say you are not the type to invent your own stuff.
Wow, that's a nice idea, thank you.
I will adapt that idea so that i feel ethical inside.
Thanks for talking to me in your sleep.
I hope you do not remember this conversation when you wake up.

Nothing beats being a freeloader who invents something from someone else's imagination, and with no exchange of business value being consensually triggered.