The government determines the employment rate via surveys, i.e. they just go and ask people if they're employed. It's not a calculation from taxes or from employers or anything.

So it's up to the gig workers if they think they're employed or not. Presumably this depends on how often they do it.

I also wouldnt count fake bullshit government/corp/college administration jobs (email jobs) with negative productivity

I just gotta pay rent dude. I'm not judging how you do it.