I have contact Mr__ZACK and asked about that and he told me that due to 3 reasons he deleted some posts.
 1: He deleted POA posts for article campaign and these articles were rejected or project was scam.
 2: He did that to avoid from being red trust as you may say that alt of M__SUFYAN but these are two friend's accounts.
 3: He want to begin signature campaign if he manage to up his rank after getting merit points.

These are not my accounts not my friends or relatives. These are just same name coincidence.