I might have considered it (data breaches aside) even five years ago but these days MN has so many snarling, aggressive and obnoxious posters that anyone seeking help or advice is more likely to get abuse than support.
I know sites change as they grow and yes, AIBU was always “robust” but it’s no longer anything like the supportive parenting site it was when I first came across it more than a decade ago. MN actively pushed AIBU to get more traffic, more media attention and more members. As a result many people joined purely because they enjoyed the argumentative nature of that topic and unfortunately the increasingly aggressive and abrasive “tone” of AIBU was allowed to contaminate the whole site.
Those posters couldn’t give a shit whether MN survives or not - they see it is light entertainment or an opportunity to feel good for a minute while they give a stranger a kicking and will just go off to other sites and snarl at posters there.
Those who really valued having a little corner of the internet that was populated by mostly women, sharing experiences, advice and perspective, were shoved aside years ago as MN pursued volume and advertisers. Why on earth would we now start paying for what it’s become 
?