Tim is full of shit.
I was a backer for Phoenix Point, and Shenmue III, and particularly the first game completely destroys his argument that backers aren't getting what they were promised as a result of Valve's unwillingness to allow keys for backers.
You see, Phoenix Point was not only promised as a Steam key, you had an option for a GOG key. We didn't get that either.
You could say "GOG refused to also provide keys". Fine, but early versions of the game were being distributed through it's own downloadable for months.
If Epic wasn't forcing backers to "embrace" the EGS, the developers could have easily continued to provide the game as they had been so far, outside of the EGS, and personally I wouldn't be as upset.
But no, I asked, and they refused to continue to provide the game through their downloader, even the next early versions would be on EGS, and nowhere else. It was EGS or nothing for a full year.
So, again, Tim can suck it.
Even if Valve was OK with providing keys to backers, or GOG, you can be sure backers would not get them.