The rules are simple:
Add 100 mana to the bounty
Comment saying that you did
I will spread your 100 mana among you and all participants who started before you.
No taking 25% of the profits for "operational costs" or whatever. I am the completely benevolent organizer of this Ponzi scheme, and I want the money to go back to YOU, the people ⁽ᵃⁿᵈ ᵐᵉ ᵇᵉᶜᵃᵘˢᵉ ᴵ ᵃᵐ ᵗʰᵉ ᶠᶦʳˢᵗ ᶦⁿᵛᵉˢᵗᵒʳ⁾.
Still don't want to join? There is MATHEMATICAL PROOF that you will get rich. If you are the nth trader, the money you will get back is 100/n+100/(n+1)+•••=∞ mana!!!*
Note: If you add multiple bounties, I'll add you multiple times, but this could be easy to miss, so I would recommend mentioning that you added multiple bounties in your comment.
*assuming infinitely many people join.