3d jobs ( fake jobs)

There used to be moderation of job postings on CGT, but people have many complaints about that. It was impossible to post job offering on weekends because CGT office is closed. On mondays usually there was batch of offerings, half of them already abandoned, or with expiration date near its ending. And despite moderation there still was many fake jobs, because moderators did do very lousy job. It's not that hard to distinguish scam or fake jobs from the real deal, especially if you automatically skip all those $20 jokes.

..sometimes I have to model a sample from the job before applying to persuade the client.
You should never do that. Your portfolio is good enough to speak for you and if some client still requests to do sample job after seeing your portfolio, you should skip such client without second thought. If you don't respect yourself, how can you ask the client to respect you?

I think there should be advance payment rule for the 3D jobs. If someone looks for 3D modeller for a budget, s/he should give for example 30% of budget to cgtrader (will be blocked by cgtrader to be paid to designer) and when job is completed, 70% will be also paid to cgtrader for the payment of 3D designer. In such case, because there will be 30% advance payment for the post of Job, only realy jobs will be announced on the 3D Jobs part of the cgtrader and fake ones will be stopped. In any case, the one, who looks for designer will find one designer on this site and in the end he will pay the announced budget, for this reason, 30% advance payment for the announcement will not be a serious issue for the real jon announcers.