If Chad is gay, I not understand why he don't tell anything to Sage and that he love her like a friend. I am sure that she would keep the secret and understand the situation(if he wished that no one know about him, of course).
I think you are severely underestimating just how much homosexuality is ostracized against, especially in "jock" circles, where you often have to be as aggressively "alpha male" as to become an outright parody of one.
Troy and Chad being gay makes a lot of sense. Assuming Troy somehow got found out separately from Chad, it would explain why he got kicked out of jocks (and why, despite all the gossip going around, it's not public knowledge). It would explain why Chad is being outright terrified of somebody knowing he is also gay.
As to Chad and Sage - Chad might as well have used Sage before knowing much about her personality. As others mentioned, top jock + top "cheerleader" is expected, and not just excellent cover for Char (from his point of view, anyway), but also mark of status. Nobody would expect him to be gay if he was involved with Sage.
Even if he felt safe confessing to her later on, then you run into what is hinted as Sage's trait of living up to the "hotheaded redhead" trope at even just a suspicion of betrayal. "Birdwatching," right?
Even after all that we, as players, know about her, I wouldn't dismiss the very real possibility that she would completely flip her lid if Chad, after initially deceiving her in this manner, would come out clean. That possibility alone, coupled with his reliance on athletic scholarship (remember the talk during the disciplinary meeting?), makes it absolutely plausible that he'd just not think it safe enough to let anyone know, period, and rather suffer unhappy relationship with Sage instead. Especially looking at the example of Troy, if he somehow got caught and already paid the price of the same intolerance of his sexual preference.
It'd wrap up quite a few unresolved details of the story, though the big one still remains - who is working behind the curtain pulling the strings of, at the very least, Chad and Quinn.
I’m ok with prostitution in principle but at the end of the day she’s the kinda pimp of teenage girls who has no issue enforcing her will by being physical with them.
For me, among other issues there's also the fact that while Quinn might be rationalizing she's doing it "for the girls," (there's no indication that she's stiffling the ones who joined for the "free* tuition," the scenes with Riona rather strongly suggest she's on a power trip. Which is all that more likely considering how Quinn always needs to be in control and dominating.
Also, it's kind of a loopy logic there: "I'm helping future professionals by goading them into illegal prostitution that, at any moment, may or may not completely destroy their chance at finishing education, much less professional future." Why not just make a deal with the owner of the strip club, especially if, by estimation of the DIKs during March of Rejects scene, Lilly is making crapton of money ("college will be cheap for her") and somehow being a known stripper doesn't seem to affect her chances of attending college at all.
Sure seems to beat serving unknown (and not exactly flush with money) college students through a gloryhole.
Lastly, without even knowing what Quinn has in store for Sage, the fact that she's just matter-of-factly declaring her intention to "use Sage" (and Riona, sadly, seems to have no issues with that, either), does not paint a pretty picture.
That'd be a...
curious project.
'shopped like a pro
Josy, on the other hand, is not but she put in a situation similar since she asking for something.
To me, Josy came out as "two can play that game" when she did that "oh, by the way, I'm Tommy's step-sister" thing. Though it's highly questionable whether or not Josy is truly aware just what she's getting herself into. I doubt it.
There are many situations where Quinn doesn't like to be told or do something against her will
Yeah, I don't think anybody can genuinely argue that Quinn is anything but intensely dominant and prefers to be in control, period.
Now that we establish who is Quinn and why we all like her (we don't have a choice)
*mumble mutter unkind words grumble*
Riona is, in fact, subservient to her
I think Riona is just somebody too laid back/lazy/indifferent (or just perpetually stoned) to care unless the situation truly demands it. She does not hesitate to voice her objections, and, to me, does not really so much fold after the slap as basically backs down to deescalate. Kind of a "you haven't convinced me, but I'll let you do your thing" feel to it.
I wouldn't be surprised to see her do a major number on Quinn if/when the two really get in a situation trully putting them at odds. If only because, by their association, she's probably the only person to know exactly who Quinn is as a person.
And I am not so sure the opposite is true, if Riona has always been showing just this mainly passive side of her.
Completely aside, you know you hit a gem of a fiction when you spend your days considering all the little possibilities and hidden details.