Most likely, it refers to – a common phrase in roleplay ASMR where the Gyaru-chan admits she only talks to you because you pay her subscription fee. She breaks the fourth wall: "Ara? Okane mo sei de, ne?" (Oh? Is it because of the money, too?)

In daily Japanese life, social rules are strict. The Gyaru-chan ASMR character says what the listener suppresses: Yacchae! – spend the money, skip work, be loud. It’s a cathartic release.