This is kinda funny
I keep getting emails from AT&T about how they want to save me money on my bill. So my line has the old $5 for 500 or 200 text's which is all I need. My Wife's line has nothing on it she hates sms but occasionally she uses it as a quick hello or I send her something random. All in All I may pay $1.50 every other month for her use of text messages.
Yet they keep offering to save me money by putting us in a $30 per month 10,000 text message plan. Someone is using some funky math here.