Yeah bumpers are usually held in place by easy peasy $5 plastic bumper brackets.
Most people pay $100s to replace the entire bumper when it sags (or rather that is what the dealership tells you to do) when it is simply replacing these $5 brackets.
My cousin's 2007 Jetta had a loose bumper, after she got tapped up by another parallel parker, and the VW people billed her $2000 for a new bumper. She was ready to pay them, but luckily I ran into her at Thanksgiving, looked at the car and told her to go on eBay and buy the $5 brackets for the bumper. They are all cheap plastic and tend to break anyway. And she got her boyfriend to put them in and her bumper is now perfect.
And that is why people love the Dizzle!