Zachary Barth made infinimer, of which Notch took the unencrypted source code and made Minecraft.
That's a pretty serious allegiation that would be easy to prove since the source code for Infiniminer was leaked and the source code for Minecraft was reversed - yet nobody came up with this but you.
Do you have any proof or we can just assume that you are spewing bullshit?
Notch Persson gave nothing back.
I would think helping out Humble Bundle (with money and with spreading the word) in itself classifies as giving back to the indie scene.
He shit all over the Indie scene, having made himself thie authoratitve voice in indy culture.
Oh, yeah, we all know the story of the extrovert Notch who has pushed himself into the limelight... oh, wait, no, it's something you have fabricated.
Frankly, if you dislike someone, just say so, but do not make up shit and especially do not make up shit that is obviously not true.