I mean, they said they'd like to get your expert input on the matter. Why not give them a chance? Maybe you can help them do some much needed course correction—which is what I understood you're staying by reading a bit between the lines.

Maybe you can even negotiate a consultancy fee with them

You can stay sceptical, but try giving them a chance. You might end up surprising eachother!

Aside: I'm getting into indie game dev recently and love your site!