Denpa + Kuma representation

At one point releases from these publishers halted and I was just curious as to why.. I like to purchase books directly from the Fakku storefront to support the company and have that digital library for convenience. Pleasure and Corruption [Denpa] only has two volumes on Fakku despite having four volumes released and two more planned (preorder open). Kuma only has four releases on Fakku despite having nine released and five more planned (preorder open). Of course, I only bring this up because I thought there was a relation shared between the three companies. Are they under the same umbrella? Did the digital+physical combo not work out for Kuma and Denpa? From here on out, will future releases only be on other storefronts? Was it a †˜this content isn’t technically hentai’ scenario, but what about the non-h and ecchi tags? If anyone has any insight on this, your reply would be greatly appreciated.