Packages increase revenue and value
Who doesn't like to comparison shop? Local advertisers sure do.
The problem is that what you have to sell isn't like what they can buy from other media companies, ad networks, Google or Facebook.
As such, bundling - or packaging - is a way to demonstrate value and have a meaningful conversation while making it a little more difficult for clients to directly compare prices... this is good since they'd be comparing apples to oranges anyway.