Yes they do. It does not mean they cheat. The Devs telling you at a blue post they’re dealing with cheating it doesn’t mean everyone you think cheats does so.
In fact it’s an anti-argument, they’re telling you you shouldn’t expect cheaters so much after they try to deal with it.
I reached level 130+ on the rewards track, but most of the gold earned went to buying the last miniset, and to buying packs so i can have enough dust (something like 2k dust) to make the Highlander Warrior Reno Brann Deck that got me to silver 5ish on average, then later had to get even more packs to dust the extras into making the Big Spell Mage, a really really expensive dust deck for me, something like 4k, and that got me all the way to my all time high score of plat 3. took buying something like 30 packs to get enough dust to make all them legendaries, epics, and rares i didnt know existed. left me with something like 1250 gold just before the brawl. ended up spending the 300g for tickets 4 times… best win streak of all runs was 2 wins. so meh. wasnt like casual Duels was any different for me. at least I did better than any heroic duels run i ever did… never could get a win ever in that version.
I figured I want to limit that. This time I got a few golden packs more since I see little point sitting on gold near the time of refunds. Though I plan to also use golden standards after rotation so I don’t want to spend it all.