Is this just like the same thing like before?
Why do this people keep sending a small amount Bitcoin to random people? He never give up
He's trying to promote his website which is an obvious scam. We've had similar things like this before but I for other reasons. I remember a few dust transactions (without fees) and they had no message attached to them.
People can have all kinds of agendas. I suspect that he is using a bot to collect addresses from the forums.