That's interesting Nam - so they post a bland, inoffensive (but yawningly boring) comment to test whether the site will let them post without checks, then presumably come back later with the "real" spam.
Makes a bit more sense now.
I had a colleague who used to reply to the e-mails he received which were in a similar vein - rambling text about religion or the like. He thought they were genuine (and yes, he got a lot of spam e-mail as a result). He was a bit odd.