Boot camps

I found this in Groupon

http://www.groupon.com/deals/rockstar-boot-camp-phoenix-1

If the link doesn't work anymore, it a deal where one month of boot camp is reduced 92%. Instead of paying $247 for a month, you only pay $20.

I'm concerned it's where you get the one month for $20, if you join for a year for $247 a month. Then how do you save 92%?

Has anyone done a boot camp?