Based on our record, Uplay seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
For Rainbow Six Siege, you will need to link your Uplay account. If you do not have one, create one for free here: https://uplay.ubisoft.com. Source: over 2 years ago
"2.1 Creation of your Account. You will need to create a UBISOFT account (an “Account”) to access and use certain Services. You can create at https://uplay.ubisoft.com/, by supplying a valid e-mail address, truthful and accurate information, and all the necessary criteria. Source: about 3 years ago
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