"Bot" interviews is what I am calling this, but what is it, and what do I do about it? [View all]

A major major retailer that everyone has heard of sends me a link and asks me questions - duties, times, pay rate - about a dozen questions, at which point it says "... we offer you a job ... Do you accept this offer of employment?"

WTF? THAT is a job offer? No one to answer questions, no come in to talk to us, no one to discuss duration, other job leads with other employers?

The real question is ... if I say yes to this, how obligated am I? Can I continue looking for other work? They have to know most employees would be gone in a heartbeat given a better opportunity. It almost sounds like they lack sufficient personnel to conduct an interview. Easier to just have someone show up for work and run with it. It could be ok if it leads to something higher. Or it could be temporary.

What am I missing?