Might be controversial but that's not one or two titles on MD that has this kind of "problem". People are basically uploading links the external websites and at this point MD is getting degraded from agregator to some kind of advertisement platform for them. But that's not what's the most repulsive. Some people are uploading links to external websites... that are paywalled and require you to pay read every chapter. Like... what the fuck. Seriously MD should do something because this is clearly scam- if they want to uphold their weird system, fine but they should advertise via google or something, not a site that provides self-hosted content.
Those links to external websites, like MangaPlus or NamiComi, are official publishers and not aggregators, which are exempt from some rules (such as withholding chapters to attract people to your website), but the links that are provided should not be behind a paywall (although other chapters can be). They typically have the first and last few chapters free, and everything else behind a paywall, so it's nice if you follow something from the start, but it can be annoying if you're trying to start something new or catch up.
This is a choice MangaDex made, if you're not happy with it fortunately there are few of them so it's easy to block them all and not see it anymore.
"Scanlator" websites (like this lovely Mangademon) that have a few titles and steal everything else from other groups to make their website look complete, and have a toxic ad-infested website, are the real issue in my opinion. Their website doesn't bring anything that we don't have through MangaDex, it's just a bad experience overall and likely not legal since they're stealing content from other groups and may have some cryptobots or stuff like that (I don't want to disable my adblock to verify...). And it's pretty easy to spot them: they are the ones putting ugly watermarks and bending the rules regarding extraneous pages, adding 4-5 "credits" pages where they also beg for money and to join their discord and check their shitty website. Especially annoying on short chapters, when there are more useless pages than actual content...
