We just built a page recently up to around ~20k followers from scratch, all paid ads on Meta. Currently earning via the FB Bonus Program and seeing low 4-figure months at the moment. I'm hoping to build this into a replicable process to scale -- the biggest thing is learning which audiences can earn the best. Some audiences just do not monetize well for some reason, possibly due to the audience, the niche/subject matter, or something else.
If anyone else is building FB Bonus Program pages feel free to DM and I'd be happy to swap notes. I fully believe there are guys with teams doing $100k months with this program