Eurogamer can now confirm this, after receiving the notice of this change that Valve sent out to Steam developers and publishers today.
"We'll still be highlighting your top games on the front page for 24-48 hour spans, but those products will stay at their most competitive discount, before and after being featured," Valve wrote.
"It's not a major change, but it does make the sale a lot more valuable for customers, and it allows us to build sale features that recommend your product all sale long, instead of just during its front page feature.
"For a brand new release, if you can't get approval for your best discount for the full length of the sale, that's OK and we can work on a plan for that game. But the vast majority of your catalog should be running its best discount for the duration of the sale."
So there you have it - two upcoming sales, but no need to keep checking Steam for sudden drops in price. But, of course, maybe just the smaller general reductions only as a result?