What's up with FFA?

For two games in a row now I’ve seen level 3 players with brand new Xbox accounts dominate in FFA. It looks very suspicious to me. These types of players have less than a half hour of game time, 100.0% win ratio with upwards of 15 kda. It just seems really weird that a player that new is doing so well. Is it possible people have found a way to cheat online? Also the Xbox accounts in which they use are really new, under 100g score new with Halo 5 being the only game played. I didn’t think much if it at first until I saw the exact same thing again on a separate account. It seemed really fishy to me so I wanted to make a post here about it.

Smurf accounts, most likely.

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Oh ok thanks guys.