Blac Chyna is following back fans on Instagram — but only if they agree to pay her US$250.The 31-year-old, who shares three-year-old daughter Dream with ex-fiance Rob Kardashian, has launched a new business venture requiring fans to cough up $250 for the official Blac Chyna Instagram account to follow them on social media.The former stripper is also charging $950 for a video call from her and, for fans who can’t afford the expense in one blow, she’s also given an option to pay in four interest free installments.Unfortunately for the Rob & Chyna star, her followers haven’t welcomed the initiative, with one referencing the coronavirus pandemic as they wrote: “Blac Chyna selling a follow back for $250 face during a f**king world crises (sic)