Blockchain.io aims to overcome the shortcomings of the exchanges by applying higher standards
(security, reliability, compliance and responsibility). This is another French project, and very detailed! By doing both tasks, you claim 18 € but since it is a contest, do not hesitate to try your luck to pass in the top 1000 (You will need referrals). Only the first 20 000 of the ranking will be eligible, it may be that the two entries are not enough if many people join the contest, think to look at your ranking and to make actions in consequence.