I think the issues I'd within the user base, it's a culture clash, here's mumsnet, a site aimed towards mum's, that are aged what, 20+? But I'd probably say most posters have adult kids, how else would you have so much free time to have lengthy debates on a forum? So let's say 40+ as the main, and now these women are being presented with their children, the next generation shaping their new culture and its a shock, out crys of men in dresses with mental issues invading our sacred spaces, whereas the younger people see it as sexual freedom, breaking out from their parents culture I to their own new world, climate changes happening all around and the job markets garbage, so what's left to work towards? I think they've chosen to work towards an idea of a loving community where everyone is accepted, obviously that has aa tonne of issues attached to it, but hey they're young and only have good intentions for the world, I remember being bright eyed and hopeful.
And who are advertisers advertising to? People with spare cash flow, you could aim for the super wealthy which works for some companies but most companies have to hit that 18-30 market of young professionals still at home or house sharing, so it's not shocking that they'd bow out to appease their market.