John Mcafee has been doing his coin of the week for the last few weeks now. If you don't know who he is, you can find him here: https://twitter.com/officialmcafee
He's been using his large Twitter reach and "security expert" name to create a pump and dump in which he tweets out a coin of the week.
Now not only he's pre-buying the coins himself to dump on his followers, but he now sells the calls to people before hand, for a price of which you can negotiate in the DMs. (direct messages on twitter)
Bots have been a common issue when he had some credibility, so he used to make ways to block the bots from catching on, well now he tries to make it easy for the bots as people don't buy his junk pumps anymore that he presells to people as "leaks", so he wants the bots to buy up his bags at a premium, and then himself and the people he sold the coinpick to then dump on all these people.
You can see proof of this: https://np.reddit.com/r/SysCoin/comments/7s3yly/john_mcafee_will_be_tweeting_sys_as_his_coin_of/
The reddit user /u/Goku900000 has been able leaked both of the previous 2 calls that Mcafee has made.
This man has one of the biggest names in crypto and is pulling the Bitconnect route of making the entire cryptocommunity look bad as he uses his large audience to create pump and dumps, this probably affects the NEW PEOPLE to crypto the most as they see his large Twitter following and see him as an authority in crypto.