You can opt out at any time but lose access to a slew of features:
Please note that users are required to agree to share their information before using DDNS, Remote Connection (ASUS Router APP, Lyra APP. AiCloud, AiDisk), AiProtection, Traffic analyzer, Apps analyzer, Adaptive QoS, Game Boost and Web history. At any time, users can search the contents of the terms at this page or stop sharing their information with other parties by choosing Withdraw.
This right here makes me NEVER buy an Asus router ever again. Same way I won’t buy a Roku.