Well, multiple reasons:
A lot of anons are personally invested in FlaVR both monetary and with their effort, say artists, few riggers, some editors, couple of sound engineers/musicians, AI prompters, we even got one boomer 50 year old with a 3d printer and resin, all who contributed a lot to the group, and were genuinely happy for girls that took on the characters, and supported them for ever since they debuted. They were doomposting hard initially. Then theres also a lot of rrats. I can elaborate later.
FlaVR itself really didn't give you much exposure outside your usual 12-20 ccv. In the end, it's really up to the talents to network and find new audiences, pump out content and stream consistently.