The program to do this is trivial anyway (Score 1)

Spammers have been able to do this for some time. After reading this article, I wrote one that does a basic job in about an hour. (demonstrated at http://www.brandonchecketts.com/capdef/). If I can do it in about an hour, then I think it's safe to assume that spammers have had the capability for quite a while now. Since most sites that use CAPTCHAS seem to be quite satisfied with them, I think that it's safe to say that spammer's aren't using methods like this. The major appeal of spam is that it costs virtually nothing. Introducing a cost by having to pay somebody to solve CAPTCHAs seems to be deterrent enough to stop it pretty well.