There are several places where a marketing message should never appear, and the corner of a TV screen is one of them.  Let's put it this way.  It's my TV.  So that space in the corner, it belong to me.  If you want to use it, you are going to have to rent it.  You may work out a deal with my cable provider who will work out a deal with me.  And even then, I will opt in.  Or I won't.  Otherwise, it's hand's off.