Tā shì yīgè liúliàng míngxīng, yǎnjì bùxíng dàn fěnsī duō.
He's a traffic celebrity - bad acting but lots of fans.
Tips
culture
流量明星 (traffic star) is a derogatory term for celebrities who are famous for their online following rather than actual talent. It implies manufactured popularity.
usage
Has two common meanings: (1) mobile data allowance (手机流量) and (2) internet traffic/popularity (网络流量). The slang meaning of 'clout/popularity' dominates online discourse.