Actually the really good recruiters always follow up with the job seeker and employer for at least the first 3 months, mostly because there is usually a guarantee involved for the first 3 months.
The also consider a candidate 600K CTC, they are far and few in between and then only a hand full are on the market, compared to candidates with a CTC of 100K of which there are many and a lot are on the market, so they are getting paid for the amount of time going into a placement. And you would be surprised how few placements are actually made in a month.
Sorry for defending here, but just had to mention these facts. If you worked with a recruiter either as job seeker or employer and you never hear from them again then you most likely worked with the recruiters mentioned in the article.