She's "selling" her services while at the same time subtly threatening them that if they don't hire her their games are going to get backlash.
And I assume she'll write a negative review about the game
would you say the same thing if she was a graphics programming expert?
imagine a game had stuff graphics, she would contact them on twitter be like "hire me i got some qualifications relevant to what you seem to need from your previous games"
if they dont hire her, the game still looks like stuff, they give it a bad review for a reason
if they do hire her, they might have a better looking game that will attract less negative reviews
now swap out graphics programming with social marketing, admittedly she has qualifications in social marketing and how to deal with multicultural/whatever audiences, so it would help to prevent future marketing mishaps
NOW, whether she has those qualifications or whatever is up to debate, and sure it's a honestly pretty condescending to contact them publicly on twitter, it would've been better handled in private emails, but this is
definitely not extortion in any sense of the word lol