Lewis Carroll — 'When I use a word,' Humpty Dumpty said in rather a scornful tone, 'it means just what I choose it to mean — neither more nor less.''
So what Laurie Penny is is whatever they say they are! Have your cake and eat it, too.
I've seen that combination used elsewhere by some university feminists who are really trans advocates. They divided women into three categories and ranked them as
trans women
nonbinary women
cis women
That is in the order of the oppression hierarchy, the oppressors being the last group.
This double-counting of people as both nonbinary and women allows someone to try to identify out of sexism and misogyny (not like those other girls) while also allowing them to identify into the gains from feminism (repro rights etc). I have little patience with them because they are one of the most vocal demanders to erase all words for female people (women, mother etc.), and it is the erasure of all names for the female sex which would make addressing sexism and sex-based oppression impossible.