There are numerous ongoing bounty programs who are rewarding the bounty hunters by stakes model and sometimes bounty hunters are disappointed by the fact that ICO's don't meet the softcap thus the users do not get any benefit for their hard work or sometime they receive too little rewards for their hard work due to stakes systems, do we really need stakes system or the best thing will be provided a fixed amount of tokens for bounty (like $100 work of tokens per week or so)?
Yes I think so, they formulated a way where they can organize the payment system of their bounty and there's nothing to worry about. Stakes are flexible it can adjust to the current market situation of the project and quite useful when there is crisis.