Does Facebook mobile (not the one with internet) count as a text?

[volleyballchic3374]

I have a verizon plan that's unlimited verizon to verizon and 500 to anyone on any other network...
The Facebook mobile that texts things to you, do it count as one of those 500, or an additional cost per message I open?

 

[Mel]

Counts as one of those 500.