Originally Posted by Zerana

Well, the top players certainly aren't spending that kind of money just to get the rewards for being in the top 20. It's far cheaper to just buy those items than spending that much on the event. Unless I've missed it somewhere, multiple accounts don't seem to be against the rules so if they have the time and money to do all that I don't see Nutaku stopping them.

It's not so much a matter of this being against the rules, as it's against any kind of competitive fair play. If you're throwing hundreds of dollars into this to get a top place, you can as easily just use your own account instead of laming the game with an alt.
We're talking about players that most probably have enough maxed SRs to build one of each possible deck, so I don't see how they could lose any kind of Rank3 fight (or even Rank4) with just a little work.
This is pretty much taking the easy way out, by grabbing an alt with a 5x Lvl1 N deck and just using all that money to make it attack hundreds of consecutive times their main account to get the atk count.

Once again, it's not a cry of cheating, as much as the bad aftertaste of a local league team in some undefined sport arranging a friendy match with a mayor league team, and then entering the stadium to find out they brought their $300mil profesional team to play against your $20k amateur one, instead of some reserve team (as is usually done for this kind of match up)