In that case, user eloff is using the wrong terminology.
An offer, in the context of a job interview, always refers to a (paper) contract describing the job title, salary, equity, benefits and other clauses, and implies that the company is ready to hire the candidate.
However, if your assumption is correct, that the company approached eloff with an offer without an interview, that actually means an invitation to have an interview with the company, with no guarantees of getting the job, so when eloff says “I'm so glad I turned down the job offer at Kraken”, I read that as “I declined an invitation to interview with Kraken”.
I have heard many people use the word “offer” to describe an invitation to interview for a job, and it irks me every time.
