Dear Somnath,
Restrictions and suspensions and limits are for You and me and other ordinary sellers.
I will show you some sellers got hundreds of negative feedbacks and DSR lower than 3.8 still they are allowed to list thousands of products and sell without issue.
Also they get promoted by ebay for promotions and deals. I will show you so many of them.
I am not sure why ebay has diffrent rules for diffrent seller.
I do not want to put ebay ids of those sellers here.