This thread could be deleted, but I will answer anyway in Hope's of you seeing this post.
A "stake" is a share in the bounty. It is an allocated number of shares, or a percentage of the shares to be paid.
 A stake = your share. What "kind" of share will vary. A token is just a medium, or placeholder of value/utility. Not all payments from bounty campaigns are stakes (shares)  of tokens. In other words, not every campaign pays its workers with tokens.