To choose bounty I have many things as considere like
1.I will go to ICO bench then see  its ratings
2.Asking for softcap reached
3.Whitepaper to read
4.Profile of team background.

This is a very interesting and valid question,in my experience realized that enough is not easy to determine how the project could shoot as skam projects regulations, too, can profit to give,I think, first we need to look at those projects that use technology or things that will love in the future will greatly develop

We need to consider a lot of things before choosing a good and worthy Bounty. We need to make sure that we gather enough knowledge about the project. A Bounty if a lot different with an Airdrop. With an Airdrop you just need to sign up and you get your free tokens, with a Bounty, they ask you to give them more time to be able to do the criterias listed on the programs terms and conditions. You need to identify what's the coins/tokens for, why was it created, what does it intend to solve, who will benefit once successful. Know the team - read about them, do a cross reference if you can, check their social sites, are they active or anything unusual? Ask them questions if you want to know something. Check and analyze if their roadmap is feasible. Make sure that you do your own research for you will act as a front liner in promoting their program, you don't want to waste your time in projects that will likely scam you out.

we must look what's the website + check the rating of the Manager + watch how much is allocated to the Fund Bounty

I use a platform for bounty hunters. They have already done the job of choice.

I think the best part of the bounty crypto exchange is that it can provide some concessions. you should do good research to choose good bounty and look for project advisors.

Do more bounties, personally I am doing a lot of bounties, because many of them will send only few tokens or they will not send anything. But it takes more time.

First, find a bounty location for the reward program you want, social media campaigns like fb, twitter, youtube blogging telegramor or reddit, writting blogs, etc. if you want to plan to join a signature campaign, it will be an ideal gift allocation because it can be 30% -40% share bounty.

Look for products services offered by this ICO, otherwise I will not join.
Check the background of the founders and developers, are they able?
Obviously the history during the project runs in the short term or long term.
if you accept positive then join.

Many things are there to see to check the bounty is legit is not one is the bounty manager if the bounty manger is good then sure he will select the good bounty and concept of the project is also important before selecting the bounty.