To the folks suggesting indies just go to EGS if they're so upset, at the moment, that's not an option. EGS is super heavily curated right now and it's really hard to get on, which the indies I spoke to for this piece understood. There seemed to be a general belief though that Epic would open its doors much wider sometime by the end of the year, though what that will ultimately look like isn't 100% clear, so it's hard to float it as a viable alternative.
The two biggest storefronts right now are either heavily curated, or not curated at all. The folks in this piece broadly were hoping for either some kind of middle ground of light curation, or essentially what Steam is now as an open storefront but with a bit more transparency as to how games get noticed. They aren't asking for Steam to hand it all to them, just to be given enough information to make some long-term marketing plans that aren't going to be upended by an invisible change to a discovery queue six months after launch.
Valve can't ans shouldn't say how algorithm works. We already saw what happened when indie devs figured out that they can set vague release date in a way that pushes them in front of games with actual release date. Any info about how algorithm works can and will be used to play the system.