Gwen has 193k instagram followers.
She does decent numbers on Youtube (im surprised they arent better tbh- 50k subscribers, 15-25k views on most videos, a few above 100k).
Anyways, on that social media reach alone she will still get sponsor money easily (maybe not nike money, but reaching into 6 figs, a solid income) and keep training for a few more years.
And moving to a new group/coach/place gives her content a little refresh so it doesn't get too stale.