@ReficuLSolbaiD welcome to digital via app only published manga era (or website sometimes, cuz they don't have a physical magazine, is all digital), this kind of censorship is not only for this one manga or publisher app, like i mentioned before in a different comment, most manga are censored to some degree in most of these apps, some are more retarded with the censorship like this one (well it really get worse if the character are actually nudes and go at it, cuz is just black bars or white fog thing) to going and use white points or fog kind of to cover some parts or a whole area (it looks like that part was erased instead), like pocket.shonenmagazine do in app or website, some other apps do this same kind of censorship even if there is no nudes, but for suggestive poses instead, it just change how bad and extreme the censorship get applied in each app or website
And well マンガUP! is still one of the apps where alot of the isekai/light novel adaptation/fantasy power trip or any manga of this type get published, and despite them being censored, those manga are still always on top in the app, either because the novel they get adapted from is actually popular or because they get popular by default if is not an adaptation (reason sometimes groups just wait for volumes to be released, and do that instead of ripping off these apps, or they never work on them beside like 1 chapter), only ones that don't really get censored, are old manga that get republished cuz they are already done and just upload from the volume i think (some manga get uploaded to their other site, ganganonline, but that usually take forever to update since they upload volume raws i think at a snail pace), but censorship is not really applied if it first start in ganganonline and then get uploaded to the マンガUP! app
And like i mentioned before in another comment, these apps usually have a "free" currency that you can obtain just by using the app daily, watch some ad and you get it or do specific things (think of them like "missions"), while yeah you can purchase the currency too, for the most part is free, unless is a app that lock chapter behind a pay only currency and have a "free" currency too, and you don't even buy the chapter, you just rent it for 72 hours, or keep it if you actually paid for it
And because マンガUP! and ganganonline have a collab contract with GA bunko (light novel label), manga adaptation of light novels under that label, always gonna end up there, so there is nothing they can really do, since it probably don't even affect them on sales as much as you would think