Favorite Soul/R&B Female Artist winners at the #AMAs this decade:

2010: Rihanna
2011: Beyoncé
2012: Beyoncé
2013: Rihanna
2014: Beyoncé
2015: Rihanna
2016: Rihanna
2017: Beyoncé
2018: Rihanna
2019: Beyoncé

How and why is this allowed? I know it's voted on but WTH?