LCS Team Pass is cool, but I want to show support for more than one team. How can I do that?

I love watching LCS - probably more than playing League itself. I just purchased the LCS team pass, and was pleasantly surprised to learn it comes with missions to earn things like a team ward skin, chroma, icon, etc. That's awesome!

The hardest part, for me, was choosing which team to support. After an embarrassing amount of internal debate, I landed on 100T but then I immediately went back to the shop to buy another team pass for C9 and TL. Unfortunately, it doesn't look like the shop will allow me to buy multiple team passes.

How can someone like me show support for more than one team?