I simply love those 'propagating prohibited' plants! That's usually the first thing I try to do with any new plant.
It's probably in a peat-based mix. They get watered before they leave the nursery and never again until someone buys them. It amazes me how much money a retailer is willing to waste by not doing something as simple as watering their plants. Sure, it can take a full day, depending on how much stock they have, but people are way more willing to drop $20 or more for a healthy looking plant. Of course, what really gets me is they let the plants literally die of thirst but still want full price for them. Otherwise they just toss 'em in the bin and write it off. Personally, I'd rather mark them down and move them. It's not as much as a write off, but it does wonders for customer relations.
Then again, this is also true of supermarkets that want $2.50 each for a table full of rotting avocados. If they would be reasonable with their prices, they would move a whole lot more merchandise.