Im getting back into the hobby, and i haven't renewed my membership yet. I saw a banner ad here on RCU for the AMA Introductory Membership program which said it costs $19.95. But when i click on the link, i dont see any information about the Introductory membership on their site. Does anyone know any information about this?

Sure:

Try https://www.modelaircraft.org/joinrenew.aspx

Them's the facts, Jack!

Don't just get your toes wet, jump in the deep end.  Go for the full membership. They you will HAVE to fly a lot to get your money's worth! 

yeah thats what i did, figured i was going to be flying for a while anyway....