I put in four urls of sites that are direct competitors to my website last night. As of today, these ads are stilling showing up on my website. I am new to Adsense so I am learning slowly.
I suggest you to give it lots of time to see the results. Before 1 month i did not see my income is at least twiced Since adsense optimized your sites with those MFA sites, after removal of MFA sites, new optimization may take time..