devtrackers.gg
I always thought that this referred to the rarity of the tiles that appeared, not a rarity bonus on the loot itself. Like, if you're farming black sun the unique helm node would appear more often.
This is correct. At higher corruption you're more likely to uncover echoes with rarer rewards such as exalted items or unique items. However the items from any individual reward type aren't affected by corruption, just level.
