Because you are a spammer.
Your posts make no sense and you are only doing that to get a signature line to spam with.
You have not made one post that has anything to do with electronics, and your company sells crap fakes and is all over the net with people warning about your fake iphones breaking after 1 day.
You sure are trying hard to slip an ad in.
Why not just buy an ad? Then people will ACTUALLY visit your site and not blacklist you because you spam.
Any company that spams forums I am on, get blacklisted, and my companies WILL NOT do business with them.
When I do business with another company, I send my blacklist to ensure THEY do not do business with spammers either.