user1475: I've just noticed an odd transaction to my wallet address. 1LnNQDKV6DiMnZ2rZ9yXpcnnTh7my1WusP seems to be giving me a free 0.00000001 BTC.
Investigating further shows that I'm not the only one receiving the free 0.00000001 BTC. Take a look at the blockchain transaction.
What is happening? Is this guy using blockchain's public note as an advertisement spam?

user1891: You are right. This is a kind of advertisement which targets bitcoin users to spend bitcoin in a particular service. Something like an booklet which people in store are giving you when you have used their service.
But keep in mind that blockchain public note is not a function of bitcoin itself (by this I mean that you can not add it though bitcoin client). This is a service offered by blockchain.info and they just add this by attaching a field to their database. You can read more about it by reading their FAQ in the section public note.

1475: <p>I've just noticed an odd transaction to my wallet address. <a href="https://blockchain.info/address/1LnNQDKV6DiMnZ2rZ9yXpcnnTh7my1WusP" rel="nofollow">1LnNQDKV6DiMnZ2rZ9yXpcnnTh7my1WusP</a> seems to be giving me a free 0.00000001 BTC.</p>

<p>Investigating further shows that I'm not the only one receiving the free 0.00000001 BTC. <a href="https://blockchain.info/tx/cb8a8c62f3654557b6ea31c27d32e8de5bef502177c809b325f7e3a46638cc62" rel="nofollow">Take a look at the blockchain transaction.</a></p>

<p>What is happening? Is this guy using blockchain's public note as an advertisement spam?</p>
 1891: <p>You are right. This is a kind of advertisement which targets bitcoin users to spend bitcoin in a particular service. Something like an booklet which people in store are giving you when you have used their service.</p>

<p>But keep in mind that blockchain public note is not a function of bitcoin itself (by this I mean that you can not add it though bitcoin client). This is a service offered by blockchain.info and they just add this by attaching a field to their database. You can read more about it by reading their <a href="http://blockchain.info/wallet/website-faq" rel="nofollow">FAQ</a> in the section public note.</p>
