I have tried several of the cheaper ones, and what I noticed is that they would start growing mold inside the brush head. I don’t really feel like putting mold in my mouth, nor do I feel like taking the brush apart and cleaning it every couple of days, so I just went back to a manual brush.
From googling it for a few minutes, it seems to be legit, but as it’s just a kind of marketplace to connect people, there seem to be complaints of a lot of bullshit like fake jobs being posted and stuff.
If she is serious about editing, it might be a possible first step to find some crappy jobs to help fill out a portfolio.