What you should know about being a [new] Globe [Postpaid line] subscriber

I've read about subscribers to Globe Telecom (my other mobile phone service provider) talk about how upon only getting their new postpaid line, they keep getting random texts from unknown numbers about the following:

• Cash loan/advances
• Condominium Unit Offers

Months ago while I was paying my bill, I spoke to the customer service representative and told him that how in the world did "these companies" were able to get a hold my new number?

He told me quite frankly that they do have some tie ups with some companies where they give out their data base info of postpaid subscribers to them for some kind of an exchange deal, and these companies will send a group message to all the numbers from the Globe Postpaid data base...and that I should just ignore the text whenever I get one.

And I did, but today, I get a random text not from a company but perhaps from a political party:

Dear Mayor Win Gatchalian of Valenzuela City, Isn't this too early for the 2013 political campaign? I'm not even from Valenzuela City?! 

Last month of April, I accidentally texted an old number of a friend and to my surprise the number replied! When I told the previous owner of that prepaid mobile number, he was surprised that someone's been using his old sim card which he thought he destroyed. Therefore, I found out that one of my friends old number was recycled by globe. 

If you're the same network as me, have you heard stories of the same/similar kind?