You might point to cover to wow private server gold win practices or pay to skip grind practices. In both cases people purchase those services to be viable in participating in it, either to get there in the first place or to actually do the material. You buy the op characters to play with, not for WoW Classic to perform itself, you buy the op weapons to perform with them not to simply own them and you most definetly don't skip difficult grinds to not play what is in the end of it to get to the good parts.
By definition purchasing raid runs is skipping content to do nothing, maybe you fork over enough to receive a few actually excellent things, but also you as a casual will utilize them for nothing as you will not raid still without paying for it, you will not triumph in the unbalanced PvP without going hardcore and world articles apart from grinds for gear worse than you paid for is almost non existant.
(In today's game it makes far buy wow classic gold more sense, as achievments have immediate value, purchasing a +10 guarantees a 410 thing, higher gear is more relevant to casuals due to casual material amounts and pvp brackets existing).
People can locate their own pleasure in Classic as casuals(leveling dungeons, twinking, farming real world updates slowly, trying to do wpvp in lower level zones) but paying for raid carries isn't enjoyable, and doesn't lead to fun barring the most loot whoriest people.