The following comes from the official website, it's not what I mean.
For the future and the brightness of the ALT coin, please stay away from bitcointalk and professional mining workers.
Hi there, my name is John and you can call me Moonmouse. On Dec 29th, 2013 I published a special type of ALT coin based on XPM algorithm - advertisingcoin(ATC).
There are thousands of professional mining workers on bitcointalk and all they do is to corner up the coins. This is why I didn’t post an ANN on the bitcointalk,instead, I chose to go through commercial area and social medias to popularize ATC. I just want this coin to keep live and get better.
I used to be happy when I started seeing more and more people mine ATCs through their ordinary desktop PC or notebook PC, especially those who were not familiar with cryptocurrencies or even against it initially. They changed and began to know, to accepting and to use cryptocurrencies. One of my friends couldn't wait to tell me how excited he was when he mined 20 ATCs using his laptop, even though it took him 3 days. I know for sure he wouldn't sell his coins to me even if I offered $20 as he cherishes the fruits of his labor and only in this way will people start to admit the existence value of the coins.
Now let's take a moment to review what had been done to the other ALT coins. First off, the development team posts the new coin on bitcointalk ahead of time, the professional workers, even some server administrators sneak into the server and use up all hardware resources to mining coins that should belong to other people just like pirates. They will not cherish the coins at all because they get them at almost no costs. They then try to sell the electronic data to those who don't understand well just like liars. People have no confidence and are afraid of putting hope on these coins so eventually these coins will come to an end. Those people who get trapped into this have to suffer financial lost so they start to hate all these coins which are supposed to have bright futures. This has happened repeatedly lately.
We made ourselves a goal from the beginning of the development. We will do our best to avoid any interactions with those mining workers no matter how slow the coins can get mined out. We want every single normal person in the world to be able to mine his/her own coins using his/her own computer.
However what we worried most still happened shortly after, the commercial was forwarded into bitcointalk. 5000 blocks were generated from 12/29/2013 to 1/17/2014 and 23000 were mined out within only 2 days starting from 1/17/2014. The numbers were still growing and we realized that those mining workers came in.
Someone said on bitcointalk that this development team didn't publish ANN and they premined 100,000 coins already. NOT TRUE! A worker tried to offered me 100,000 for only $2000, why would I spend so much energy premining for only this little money? What a joke! (and here's a mining report http://www.advertisingcoin.org/mining-report.html) I couldn't imagine what would my friend do if I told him those 20 coins that he spent 3 days on worth only 40 cents. Would he be interested in the game still? I doubt it.
The coins become less valuable when more of those workers come in. In a opposite way, more normal people, the more valuable the coins are.
I sincerely would like to ask all development teams to stay as far away as possible from bitcointalk and Professional mining workers, otherwise no matter how great the algorithm is or how innovative the idea is, they will end up becoming a tool for those liars. In the end I sincerely wish all development teams have successful endings for all their fabulous hard work. 
