It is true, but IPS has a mechanism for upgrading and degrading packages, with or without the possibility of compensation between the packages.
Now it is impossible to choose a package without offer pinned, and then reconsider your view and go to a package with pinned. Maybe it is not necessary, it can even bring this function as a Bump into a separately paid one. It will be even better.
How I see perfect packages:
1. Ability to specify the allowable number of Offers in package (from 1 to infinity). Member does not pay for each of Offer, but immediately a lot, for example 10, 20, etc.
2. Ability change packages (both down and up) between packages.
3. Ability package renewal.
4. Expanded ability to highlight Offers (each separately within the same package) for a fee (Pinned offers, highlighting, etc.)
5. Transfer allowed number of images for Offer to package settings.A very useful feature is the ability to select an image for Offers from Gallery albums. Ideally, if you could Specify from which album to choose. This is important when a narrow pool of products is generally used, and their images are not so important, but there are a lot of offers for such products from different sellers.
I would add a function that after a certain time (configured by the administrator) deleted offers that were expired (to save space).