Like I said, though, quality in almost everything but the equipment being used is very subjective.
If someone goes to a site, and likes black girls; and sees the site has very few black girls on it, then he will think the quality of the site is low, as well as the quality of the models. Same for someone who likes Asian girls, or big girls, or fetish girls, etc. If the site doesn't cater to what the person wants to spend money on, then that person will think the quality of the site and its models is low. That's very subjective.
The same with the design of the sites. I like the K.I.S.S. designs, both in my social networks and in my cam sites. I don't need flashy banners or backgrounds. Not everyone agrees with what I like, though. So, again, very subjective.
The quality of members, well, I'm sure we can all agree that MFC does sort of cater to the lowest common denominator, there. But this doesn't mean there aren't good members on the site. They just tend to get drowned out by the loads of freeloadiing "show tits/ass/pussy/feet" people that happen to inhabit the site. And one doesn't need to be a whale/sugar daddy type member to be a good member, remember.
I'm hardly a whale or sugar daddy member, but the models I know like me, even when I can't tip/group/private. I make fun conversation, stupid jokes, don't beg or demand, etc. And when I tip I often put fun tip notes to make the model smile/laugh. As for when I private, I don't do less than 15 minutes. But, does that work on every site? Probably not. I'm sure on some of the sites you are thinking of, I would be considered a "bad" member, simply because I don't have hundreds a day to spend.
One thing that ends up being not subjective is the quality of the equipment used. If a model on any site is using a shitty camera, has bad lighting or sound, etc. then she isn't going to do well on any site. I don't care if she's the personification of the Goddess Venus/Aphrodite, if her equipment just sucks, no one will go to her.
Also, ironically, MFC has been fairly stable for a while, now. Sure, there's still some problems, but the constant full blown hamster in the wheel running the servers dying hasn't really happened a lot, lately. Most server resets have been preempted by the warning that it would be happening, and have been fairly short in duration of downtime. About the biggest problems, lately, is models getting kicked out of the broadcaster in the middle of privates/groups, or the model's cam not showing up in them or in public chat.
But, every site has these sorts of issues. Because nothing is perfect. Last year's constant MFC crashes? Yeah, they were bad. There were days it seemed like the site was resetting more than it was up. But it's worked itself out. It seems on par with pretty much every other website out there, right now.
What ends up setting MFC (and I suppose Chaturbate) apart is the ability of the sites to create a social atmosphere. Where members and models can be friendly to each other, laugh, joke, and have fun. Most other cam sites don't really cater to that sort of interaction. If you aren't in private with the model, she's pretty much just waiting to be taken private by someone, and the interaction between the model and members is minimal beyond the freeloaders on those sites attempting to get her to do things she isn't allowed to do on those sites (like get naked in public).
Ask any MFC/Chaturbate model on here if they have members that they enjoy seeing in their rooms, even if said members aren't spending any money. I'm sure the majority will say yes. Because the social aspect is allowed on MFC and Chaturbate. Sure, in some cases those same members are some of their biggest tippers; but even the not so big tippers can be regulars and the models can enjoy them in their rooms. Other sites that don't really cater to a social aspect may not get the same reaction. Mostly because members and models tend to be one and done on those sites,
So, in short, there's a lot of subjectiveness to quality. The quality of models, site design, and even members is fairly subjective. The quality of equipment and site stability, however, is not.
Oh, and honestly, I don't think this Redban is as high profile as he would like to think, or you think. I never even heard of him before your post. And after listening to about half of one The Joe Rogan Experience show, I kind of see why. Podcasters get big in certain niches, but very rarely break out into being truly high profile. Take it from someone who used to be kind of big in a niche of podcasting. You get known in a niche, but hardly anyone else knows who you are, or even cares that you exist. I was semi-big in one niche, for a while. But, on the whole, the rest of the world didn't know who I was, or gave two shits about me. And I was fine with that.