You can see quite a number of "notes" there.
I wonder why he receives so many when other addresses receive nothing
Deposits are often 0.0001BTC!
IMO, there are 2 reasons.
1. The address is one of the richest addresses (http://bitcoinrichlist.com/top100).
So, people are more likely to check that page from time to time, and so it has a higher successful rate for the ads and begging stories (I personally don't think it works at all).
If you check the list of richest addresses, you can see there are notes on many of the addresses as well.
2. The bitcoin on that address is indeed the "DPR Seized Coins 2".
So, you can find some sorts of messages to the FBI and US government (Of course, the FBI won't care about it).
I missed that, I guessed it is probably worth 10,000satoshis to have your name out there
The messages are only "DPR Seized Coins 2", what does it mean? Why aren't there any other messages?
The messages are what is under "Public Note"
Right, thank you, sorry I was out of it; there are a dozen of messages, it is entertaining to read If I read them, probably a lot of us did so it can be a good idea to throw a 0.0001 to advertise a website