What if the reason Gillian stopped teasing David is to protect their relationship? Maybe they’re talked and it became clear they’re overexposed. BTW, I guess she didn’t mention him by name in that article bc the focus was on the subject: women’s equal payment wrights. She’s talking about underpayment in Hollywood, not about her friend or whatever-they-called-their-relationship.

I don’t think either the fact she didn’t mention his name in this article is relevant, and it was rewritten anyway, so we have no way to know what she really said.
It’s a possibility she stopped trolling because they thought their relationship started to be too much exposed and they wanted to keep some more privacy. It’s also possible she was tired of people focusing on her relationship with David rather than the projects she tries to promote.
I guess we’ll see what happens when she starts to promotes lighter projects like American Gods and when XF season 11 is announced.