Just like the copyright service, you have to do all the work, and they just do some simple filing for you, so for the OW-C card, you'd have to take the courses and do the cert dives, and they'd file the paperwork.
For a generous fee, of course. As I recall, it only took maybe five or ten minutes to fill out everything for the copyright registration online, for which that outfit wanted an additional $144 above the cost of the filing. That's a pretty decent profit margin, if you ask me. $144 for a few minutes work? Maybe I'm in the wrong business!
Since the thread is already taking a minor sidetrack in this direction - a simple copyright registration is no big deal. Most reasonably intelligent people can handle it.
It's pretty easy, however, to get beyond a simple registration, without realizing it (compilation of works, multiple authors/copyright rights, special classes of work, work made for hire, derivative works, trade secret content). If the registration turns out not to have been a simple one, the $144 would look pretty cheap in hindsight compared to what it will cost to correct the mistakes and protect your intellectual investment. (A botched registration with even very minor problems can significantly delay obtaining relief in court - which is really the only time you need to have registered your works at all.) At going rates for intellectual property counsel, the $144 would pay for anything from 15 minutes to 45 minutes of work (depending on the firm and perhaps the experience level of the person working on it) - not so far off from the time you spent on it.
That said, I doubt your solicitation came from a reputable law firm. More likely it came from someone who wouldn't recognize whether your work involved any special circumstances which would have made the registration more complicated so it would have been throwing money at someone with no particular expertise to make the add-on fee worth it.
- Oh, and in a reputable law firm, the $144 has to cover not only the attorney's time, but also pay for the rent, office staff, health insurance, employer's and employee's share of social security and medicare, worker's comp, malpractice insurance, phones, computers, etc. Not saying its a bad gig - just not as outrageous as it might seem at first when you think of $144 for a few minutes work.