I seem not to properly understand what stakes are and how they are calculated in bounty campaigns for ICOs. Why don't they just for example state they'll issue 20 tokens of a particular coin instead of stakes. Good examples I've come across are;
From 26 to 99 friends - 15 stakes
From 100 to 249 friends - 30 stakes
From 250 to 999 friends - 65 stakes
From 1000 to 9999 friends & followers - 130 stakes
10000 friends & followers and more - 300 stakes
-Hero/Legendary: 3.5 Stakes
-Sr. Member: 3 Stakes
-Full Member : 2.5 stakes
-Member: 1 Stake
-Jr. Member: 0.5 Stake
How are the stakes converted into tokens? Forgive my ignorance.

look at the total token bounty supply, in case they issue 1,000,000 tokens for a bounty participant. and for signature 40%. 1,000,000: 40 = 400,000. and distributed to how many people participant in the signature. that's the result of his / her token.