If the ratings are bad then it gets written off as a failed experiment. If they're good look for more games being streamed by random pay channels. Them it will snow ball.
The NFL playoffs are about as sure of a bet as can be made - the ratings aren't likely to be bad, that would be an outlier. But even if they under-perform, it's not going to sink the idea that these platforms will bid for access - they're well funded, highly competitive, and take a long view on building their content. A single event isn't going to make or break any of it.. The NFL is in the cat-bird seat with it's high-demand product and everyone knows it.
It would take a fan revolt on a substantial scale to even make a blip on this - and that's just not going to happen.