Fyi, the 500 texts for $10 which I believe included unlimited text messages between other Verizon Wireless customers is a feature plan that is no longer available. If you have it now, you are grandfathered into that plan. If you remove it you can't get it back.
The current message plan available at $10 is for 1000 messages to any carrier including Verizon Wireless customers.
I'm most definitely NOT a VZW employee. If a post answered your question, please mark it as the answer.