The reason they post like this is it blends better with the forum. Then it is less obvious than.
I'm not seeing a link there but they tend to make a few posts before slipping in the links now, also so they don't tip off anyone that they are here to sell something not talk about cc.
Sometimes the link is a signature instead of in the main text.
We finally got one at our forum trying to sell BMWs. I switched the link to Molsen's website and made fun of the attempt. So far that was the only post so I did not ban the bot I was genuinely interested to see what they would do next. So far nothing.