That means nothing, it's anecdotal evidence. Even if we lived in a statistically perfect universe and the drop chance was 5%, it would only mean out of every 100 wins you would get 5 Scrolls, which could be your 96th and up - and that's with an example percentage, for all I know the drop chance is much lower. In the real world you could go 150 wins or more without getting anything while someone in the same Battlegrounds gets three in a row. It's like you people are finding out about RNG this week, c'mon...