Why Would BANS Sites On INFO Domains Be Deindexed?

This is part two of a series of post where I try to understand why seven of my BANS stores were deindexed by Google. Recently Google purged its index of a lot of INFO domains. Many of those domains had BANS sites built on them. Is there a connection between having a BANS site on an INFO domain? Is building a BANS store on an INFO domain a bad idea? What does domain tasting have to do with INFO domains and BANS sites? Are BANS sites viewed as spam sites by Google? Is Google targeting BANS sites, INFO domains or both?