The free Gillian thing is silly but I disagree with your answer. Gillian said she did s11 because she felt last season didn’t do the show justice and she wanted to give it another chance to make things right. She says she wants different roles and that she prefers to play Stella again than Scully. I won’t be happy if The X-Files ends for Mulder and Scully but I won’t be surprised either. Plus now with Disney in the picture who knows if they’ll get a chance to do more.

Gillian said she agreed on season 11 to give the show a good ending only because she couldn’t decently say she did it because it pays well. I’m sure she’d rather play Stella than Scully even if I don’t remember her saying that in those words, but the fact is that The Fall isn’t coming back unlike X-Files. And even if it was coming back, it’s still a small Netflix show compared to the huge brands they produce lately. Also, its audience grew along with Jamie Dornan’s career thanks to Fifty Shade. Now that they killed him off, nothing says it’ll keep its audience only with Gillian. So she may prefer Stella to Scully, but Scully can keep existing whereas Stella is likely gone forever.
To be honest, I’ll be surprised if both David and Gillian say their final goodbye to XF with season 11.