Well, spammers obviously begin to try tobe like just normal forum members.
I have seen totally generic, spam-free posts from spammers, too. These posts did not contain the slightest hind of spam, but were SO MUCh generic, they sometimes even missed the discussion's topic.
They sounded a bit like the reply from above.
I have made up the theory that such generic, spam-free replies are used as tests on communities to see how they react.
If reactions are positive, they might - according to my theory - later be used as compounds for spam.
Another theory of mine is, that similar generic replies are "collected" by some meta web crawler (a similar thing like a web crawling search engine) to be put together into spam - e-mails or into bigger forum posts.
The most bizarre example of spam I had encountered so far was a more or less (I don't remember any details anymore correctly) forums entry which contained links to a completely normal looking blog.
And *that* blog contained spam ! Hidden as simple text links within a much longer text which was "crafted" so, that it was meant to appear to occational readers as a pretty normal blog entry.
And the simple text links embedded within this huge block of text went to a ... well, I think it was a company of some sorts for which the spam was meant to be.
I think I should still have a copy of it somewhere.
As an essence, it boild down to the creation of an Eliza-like
Turing-machine which is meant to fool humans by pretending to be a ghuman forum member, too, which is then able to - rather implicitely - offer them (the readers) spam.
