It´s something like the shares in a company. For example, if you are participating in a bounty campaign that will give out 10k USD between the people that will participate in the signature campaign, you can calculate at the end of the campaign your share of the bounty with 3 simple steps:
1. Sum the sum of stakes of all participants (for example the sum was 100).
2. Divide your stakes (for example you got 5 stakes in the campaign) by the sum of stakes of all participants (so in our example the result would be 0,05)
3. Multiply the result of the previous operation by the sum of money that will be given out (so in our example 10,000 x 0,05 = 500USD)
So in this campaign you would get 500 USD.
Yes, this is also the method I am using. But also remember that your stake in bounty may vary based on your rank, the higher the rank the higher the stake and also reflects on how many posts you did per week
and most of it on how you take the rules for some campaign may give extra stakes first it is yes based on the rank , on how you are able to ware their signature and the avatar , and on how many post you are able to make for but not all campaign do that this may based only on some campaign.