Lots of employment scams out there. Is this being done on the official company site? If it’s all legitimate, unless you sign a contract, I don’t think you would be obligated to do anything.

thought the online job offer is a new wrinkle. Schedule an interview I understand. You're hired by screening questionairre is a puzzle.
My inclination is to go with it and try to make something of the interview. But will there be one? This feels more like scab labor in a parking lot than an actual job application.

the job and find you hate it or it is not what you were led to believe, you can simply walk. But if it turns out OK, you got yourself a job.

Congratulations.... I think!

Really not cost effective, since basically it's going to be some person asking you the same questions and running the same instant background check they probably ran based on the asnwers to your questions. Unless it's a management type position, and is for something likes sales or seasonal work, then this is not a particular surprise to me. Since you haven't specified what the job opening was, it's impossible to comment further.

I have to wonder if they're using this system to trick candidates into accepting the sub-standard pay rate. They ask you to "accept" a job offer before meeting them, taking a drug test, and the background check. So if you pass those it's no longer an offer of employment, it's already accepted, for an erratic, unknown, part time position. It's committing to something unknown and unknowable. So if you decline at that point, you've quit a job you never worked at. And there are no actual people to talk to about the position, scheduling, future benefits, permanent employment. I understand they put no time in it because time is money and there is no HR. But what presentation to the working public!