Honestly, people tweet about everything anyway. You don't need to tell people to tweet about Impact. If they are watching, there's a good chance they are tweeting about it. That's how people are. Thus, telling them to do it just gets annoying because you are telling people something they were going to do anyway and that may take the fun out of it.
I think twitter does have a value in wrestling. Her is a perfect example. We just had a really cool overtime match dor the title, yet no one knew about it. they should use twitter to at least get the word out that there is something as big as the end of an angle to be shown on thursday.