Indeed.com – Postings Real?

How many job postings on Indeed.com are even real? I am currently employed full time; but always troll job postings for better hours and more pay. I have applied for quite a large number of jobs thru Indeed.com and have never landed an interview. I get rejected with no explanation and the jobs I have applied for still exist in their listings.

If these listings are real, 1) companies should state reasons for the rejection. How else is one able to improve their cover letter / resume? 2) If the position has truly been filed, the posting should be removed.