Introduce Changing after free introductory 90 day period
In order to quickly populate our site on launch on the 1st Dec 2013 we want to offer FREE ADVERTISING for a 90 days period (3 months) to the 1st March 2014 to all new advertisers.
The question is what is the best way of doing this?
Can we start with no changes then change to paid later?
In other words at 90 days they would be emailed that the listing is going to expire and they cannot extend FREE but would have to pay?