I've been out for a while in bounty campaign, but based on what I noticed, the signature campaign has a higher allocation in most of the bounty, there are also bounties that gives a huge amount of supply to the bounty campaigns, but they are mostly a failure or scam, the high allocation is just to attract bounty hunters to promote but the project has not good quality.

I suggest, you look at the most important factor, and that is quality over quantity.