Spam, Scam, and Duplicates prevention

In the last few months we worked on preventing spam and scam job postings.
There is always room for improvement, but significant chunk of anti-spam and anti-scam measures is already implemented.

Q: How does spam prevention work?
1) PostJobFree.com does not allow job postings that are more than 90% similar to other postings you made.
Note that typical job posting is between 0% and 30% similar to other job postings, so it's unlikely that typical posting would look like duplicate.
See also: No duplicate postings please

2) If your postings are marked as spam by job seekers -- your posting limit goes down.

Q: How does scam prevention work?
When we identify scam job posting (typically money laundering of some form) we either delete such posting or mark it as "scam" (so job seekers could learn to recognize fraudulent postings).


Your feedback
Anti-Scam and Anti-Spam measures improve quality of job postings and make job search more effective. As a result, every job post would attract more job seekers.
Please, let me know what you think about Spam, Scam, and Duplicates prevention.
You may comment here or email to feedback@postjobfree.com.