Thank you for your oppinion.
You really bring it to the point:
"And I hope others will think carefully about this even if selfishly it might benefit you in the short run."
So please do this and think not to your guild who get a top-3-spot in Tier 2 but think to the guilds from place 4 to place 10 in Tier 2.
Why this guilds should get double lower rewards - first cause they took less points (this is okay) but second cause you want consist to your top-3-bonus and don't want share them with the 7 guilds who was not able to join the top-3.
You thought to this point ?