Considering how many people are win-trading RBGs I doubt Blizzard ever gave a warning, let alone ban someone for this. They probably don't even know about it, or if they do, they have no clue how to fix it, and it's their fault for this phenomenon. There are tons of people from multiple player categories who are doing this, casuals, pvers, decent PvPers, hardcore PvPers (gladiators or R1 ones), etc. If anyone is to blame for this, it's Blizzard, not the wintraders, and tbh, why the hell would you even care about what others do? This kind of threads are sickening... Just move on, get better at game and get your stuff for real or wintrade yourself, QQing on others will not help you whatsoever.
Buying Gold you "Spend real life cash for ingame gold"
That is the major difference in those 2.
To sum this up if buying RBG ranks is breaking the rules so is selling heroic raids runs.
Even more so when all both teams is doing is syncing there Q's so they can group together.
Last checked pushing a botton at the sametime as another player is not breaking the rules.
Of course wintrading is against the rules, everyone knows it and everyone knows why it should be. There's no debate here or at least there shouldn't be. I'm certainly not going to debate the obvious.
Further, if you do even a tiny bit of research you'll see that historically Blizzard has issued bans, some even permanent, and often removed gear. Now, whether the current Blizzard team will aggressively pursue the problem I don't know. They don't seem too concerned with the integrity of their game these days and as I said earlier, historically, it takes them months, even years, to put a solution in place. And said solution will likely have nothing to do with any solution that requires significant effort on their part.
Unfortunately, absent direct and visible enforcement, the current situation will remain.
Beware of the man who works hard to learn something, learns it, and finds himself no wiser than before... He is full of murderous resentment of people who are ignorant without having come by their ignorance the hard way. -Kurt Vonnegut, "Cat's Cradle"
If a three hour ban is all the punishment there is, it's totally worth it. I don't personally use the system, but I just do not see a reason they should stop. Three hours is no punishment at all, in my opinion.