He means Model View Culture: [1] https://modelviewculture.com/

I think.

I didn't expect the google results to be quite so utterly worthless; I am apparently the only person to've called them that anywhere indexed, only on twitter, and I only found the tweet by googling 'avoiceformanchildren' (I was in a lovely mood that day, apparently; being a relatively moderate libfem turns out to result in ending up angry at basically everybody).

Dear Google: Please up your game to compensate for my stupidity -- love, mst

Dear wtbob: Doh, sorry. What rewqfdsa++ said.