Increasingly, no - people do not still read The Guardian. Or most other online newspapers.

I think the feminist slant is partly ideological, but also partly an attempt to capture the eyeballs of a middle class (read: relatively affluent) audience no one else is pitching for.

To me it looks suspiciously like a very calculated kind of feminism. I can't say I'm a fan, and I suspect the niche is too small to keep the paper afloat for much longer.

The market is easily enough to support a mid sized news website, several actually. But it's a saturated market with lots of competition. The amount of reporters willing to write for less if they get to display a feminist slant is multiples more than the amount necessary to satiate the audience who might want to read them