Protocol has a 24 eth budget. For me its a good deal for a campaign. It is handled by Bounty Detective which was proven paid all his previous projects. Unfortunately we cant have some LDN tokens and it seem they want to preserve the value of their tokens so they instead pay on ethereum.
you can get their tokens from airdrop, they also hold airdrop managed by bountydetective as well, and the prizes they give are quite good at $ 3 per person, and a referral of $ 0.50 per person, you can check it on twitter airdropDetective
Ludena protocol is only good because the team planned to pay in ethereum, but with just 24eth bounty participants will be lucky to make reasonable amount of money, I bet the spreadsheet will be full of bounty hunters already, 24eth too small for the campaign