It is between the job poster and the freelancer to agree to payment terms and process.
There are no payment options through the site. Think of it simply as a forum.
I can see you are wearing their logo on your avatar, which probably means you know how the site works or have some history with them. My issue is how is the freelance protected from the fraudulent job offers?
I have worked with some freelancing platforms in the past, and they would use smart contracts that act as an escrow to hold the funds that are to be paid to the people doing the tasks. I think even Gitcoin does the same things.
Your best best is to create milestones, for example if you are a job, say you will do 20% of it, and then expect 20% payment. For example lets say you bid 0.01 BTC, to write 10 stories. After you write 2 stories, you ask the employer/contractor to give you 0.02 BTC, before you do 2 more.
This is simply an example of how you would go about it. This website is basic and does not have enough traffic or interest to warrant more advanced features.