Ok I got it.

How come activating a new category and thereby making all the products within it green or activated will not trigger the tweet? Is it a different system working on automatic activate as opposed to those I move and manually turn green?

I have tested and moved one of the product on the temp category to the active category and turned it green. There was no tweet.
(It was tweeted before under the temp category when it was not active)

Reverting back to the original php file.

I think the module works so great! I'm a big fan of this indeed as it saves me a lot of time in tweeting it individually. I know I'm asking the sun and moon especially for free module but it would be great if it can only tweet when the product turns green whether or not it was manually turned green or automatically turned green by activating a new category.