Can someone explain the catch??

On the Verizon home page it says learn more on this deal so i clicked that button.

All it says is get 50% off text messaging phones and get unlimited texting to anyone on any network all with a new 2yr agreement. This sounds to good to be true.

I read the small print and it didnt say you had to pay the monthly fee for unlimited texting.

Can someone shed some light or clear things up for me??

Thanks in advance.