Some titles, mostly these provided by DLsite under the reoRO banner (normally released by Coquettish Doll PoRO, Suzuki Mirano or Milky / Platinum Milky), are not provided by DLsite for eternity, they are posted for a special time delay and will vanish from DLsite any time later then.
The ban to post this material only lasts as long as they are mentioned at DLsite.
This already happened with one title, don´t know which title it was atm...
reg. category 5 in detail: I would only see the titles by CPM and right stuf as critical, as CentralPark Media is mentioned in the DO NOT UPLOAD LIST anyway, licenses expired or not, and as Wheather Report Girl as right stuf material once already had to be removed due to the DMCA request.
As Kekko Kamen is an ADV release and posted here already the same has to go with Dragon Knight 4. There is no request by ADV (yet). ADV titles still are in the anime section to be found as well.
But I do not want any of the Happy Carrot releases to be posted here although it´s an ADV sub company. This is my decision because I want to be cautious and try to avoid trouble for this site only. Titles just are too recent ones and newly on sale, re-releases partly though.
edit: we also had one post of Sprite: Between two Worlds in the past which had been deleted with the DMCA takdown request as well, releasing company was Anime Studio Inc. normally. So although this old company already appeared to be dead there still was the wish to get it deleted, someone else should be the rights owner now, and it seems be related to ASM too.