If you look at the very bottom line right above accept and reject. the last line is blurred, I don't know if this is intentional or not. Just wanted to give you guys a head up! Keep making the amazing game better!
YOU HEREBY ACKNOWLEDGE AND AGREE THAT YOU HAVE READ AND UNDERSTAND THE FOREGOING AGREEMENT, AND THAT BY SELECTING THE “ACCEPT” BUTTON BELOW OR OTHERWISE USING OR ACCESSING THE RIOT SERVICES, YOU ARE AGREEING TO BE BOUND BY THE TERMS AND CONDITIONS SET FORTH HEREIN.
https://na.leagueoflegends.com/en/legal/termsofuse
I think it was a lazy programming error at not setting the fade functions to 0 if you reach the end of the document.
