Not really, because that's not a unique aspect of any of those. It's true of all subscription services (that I'm aware of), as well as all of the free models. The selection bias primarily will be against models which be an outlier in the difference between openrouter users and total users, which is a much harder position to argue for any given company except for maybe Twitter.

You can argue there's a selection bias that openrouter users are less likely to display model loyalty, but it would still be a visible confounding factor if it was a statistically significant behavior. And it's not. Nor is there a visibly meaningful indication that people don't sidegrade between models. With every single data set, you're going to see that. You're also going to see it reflected in discourse, as I mentioned. Fact of the matter is there isn't a status quo in AI any more than there's a status quo in cars.