I think it all boils down to the specific goals and needs of the company doing the crowdfunding or ICO. If they have ambitious plans like exchanges, or cryptocurrency to gold investment, crypto-banking, and those similar to companies doing mining equipment or the like, will certainly demand a big amount in their campaigns. Big needs will certainly put big allocations in their bounties and that would be enticing for the bounty hunters.  There are also those small campaigns because they only have few goals to achieve in their profitability plans so they can only give small allocations as well and their crypto volume is also certainly low.

But it does not mean that small campaigns won't get big in the long run and those big will immediately get big value for the cryptos. In my own opinion, a good leadership and good management and interaction with their investors and stakeholders would be my number one thing to consider in picking these campaigns and not the allocations they give out when joining bounties.