my humble opinion. It would be interesting if the plugin is able to create premium and free packs. and that the user choose the desired pack. with number of images, expiration days, bonus and more. a text where you write number of views among others.

is displayed when an ad is published.
Suggest a pack to the user when registering. Choose one free or premium. and its benefits.

maybe they can add it in the later versions

@mariogtz
Thanks for your suggestion

+1 vote from me.
This way the client will see the difference better.

Also, the packages might contain diverse combinations: highlight, premium, republish options and so on.