Oracea just expensive doxycycline?

I just saw a commercial for a product called Oracea.  Oracia is "a low-dose form of doxycycline" for the treatment of a skin condition known as rosacea.

Doxycycline ought to cost no more than $10 a month, but Oracea costs $200.    I did some checking on the Internet, and Oracea may be the poster-child for health-care costs run amok (h/t rosacea support):

KUNC: The Big Zit Rip-off, Marc Ringel
GREELEY, CO (2009-05-18) Most agree that something needs to be done to overhaul America’s healthcare system. But leave it to KUNC commentator Dr. Marc Ringel to illustrate the problem – through something as small and innocuous as a pimple.
Or you can buy Oracea, a brand-name doxycycline marketed by Galderma Laboratories. Oracea will set you back over $200 a month if you purchase it in this country or about $150 if you shop online and make your buy from a Canadian outfit. To be sure, the dosage of Oracea is 40mg, making it, like the baby bear’s porridge, just right.
…
I cannot imagine, though, how the extra 10 mg in a 50 mg generic doxycycline capsule could cause close to the distress that too-hot or too-cold porridge did to Goldilocks. Nor do I see how Oracea would work better than the plain vanilla generic except, perhaps, for an enhanced placebo effect generated by spending so much money on a product marketed especially to this affliction. A person might figure that such an exorbitantly expensive brand name would just have to work better.

Oracea is claimed to have this advantage over doxycycline:

Oracea is able to maintain a sustained release of the active ingredient doxycycline without venturing into anti-microbial territory. The advantage of a delayed release product is that Oracea can offer the `area under the concentration-by-time curve’ delivery, but at sub-antimicrobial dosage over 24 hours.

That is, Oracea can deliver a dosage of doxycycline that can give measurable results, but keep the concentration of doxycycline in your blood low enough to reduce potential problems associated with antibiotics.

If you are interested in researching this question further, the Rosacea support group website looks like a good place to start.