Replied to job posting on LinkedIn. Had initial phone interview with recruiter to discuss the position. The position was initially unclear as to the nature of the position, how the product would be sold, even who the actual employer would be. This was clarified after quite a bit of questioning. The recruiter expressed enthusiasm about my candidacy, and provided additional materials, with a promise to call back the next business day. I spent the weekend reviewing the material and researching the products. It is now almost four weeks later and there has been no further communication in spite of multiple attempts to re-engage the recruiter.