another stacking realated question

[Tsunami]

Yes stacks do affect the drop rate if you created the game or if you're playing single offline mode. If you stacked yet you didn't create the game in multiplayer or online, you can still find rares.

In the end, stacks do affect your drop rate.

Note: You won't find rares if you stacked in offline mode or if the player who created the multiplayer game does.