I find them useful as well, as a childfree person. I hate to admit it, but the truth is that one thing narrows my dating pool so significantly, the chances of me organically finding another single childfree person I’m compatible with by doing group activities or classes is next to zero. They’re money making corporations first and foremost but that doesn’t mean they’re worthless. They’re the only option for people with lifestyles like mine, as well as queer people, ethnic minorities looking for someone from their own culture, and autistic people who struggle in group settings.