See, now that kind of "bracket/lvl range" seems as uequal to me.
But just out of curiosity, yep, at lvl 280 seasons give (incl. that payed line) 70,3M cash (17,5k points) & 123K XP (1.23M points) in total. So yeah, those points numbers should be achievable with stacked rewards even from half of the season rewards. (Someone knows how big are the season rewards at lvl 315? Or the amount difference within 35-40 lvl difference?).
Nevertheless - do not forget that seasons are contunious event - through whole month - it lasts 30 days if I am not mistaken, a lot can change during that time. Do seasons rewards change sequentially midseason or they depend on pre-set lvl at the start of the event? And one more - if the season reward is achieved at lvl 260 but claimed at 290, does it continue evolving with lvls or it is already set in stone at the moment of such achievment?
Bottomline: In my opinion in the name of fair play, rewards from seasons (and others events) should not be stackable that way, e.g. they should be automatically claimed after every days end, moreover "contest lvl brackets" (I reckon are depending on the server player count, but nonetheless) should be much narrower (10-15 lvl difference should completely suffice).
Thanx all for all the info/opinions. Main question of this topic is now closed for me. Thanx.