I assume that in modern times, every public figure has a social media account, either run by themselves or someone they pay to maintain it. But as far as actual influencers, Iono and Raihan are the most explicit examples with Klara being implied. I'd think the artists (Burgh, Brassius, Mina, etc) use theirs to shill their work or share the process of creation and guys like Wulfric and Crasher Wake post oddly inspiring but strangely worded motivational messages that the Pokemon world internet finds top tier in comedic value. Guarantee that every villain that got caught is banned from every platform.