Board Thread:Game Discussion/@comment-10214922-20130602042349/@comment-10214922-20130603103752

By the way I don't understand this language:

When you purchase the 20th Tier of this Episode's Space Bridge, you are guaranteed an Ultra Rare Ironhide character card.

Purchasing the 21st and Final Tier will give you the greatest odds of obtaining an Ultra Rare Ironhide character card.

How can the 21st tier have greater odds than guaranteed (100%) on the 20th tier. Doesn't make sense to me.