Haven't been affected by it. Got games like Nioh 2 and a bunch of other games during the last humble bundle choice for less than what Nioh 2 has gone on sale for by itself.

And games frequently see sales before launch and after launch at prices that Steam won't see for months from places like Fanatical. Isthereanydeals provides historical data on it tracking prices of games from launch across various stores.

Regardless of the wording it hasn't affected sales leading to most of my Steam games having been purchased outside of steam, and those sales are ones steam doesn't get a cut of on top of that. Only steam purchases I usually make are ones where the publisher either doesn't bother making keys, or it's the only way to get the steam version of the game, or the rare occasion the it is actually the historical low on steam.