Fanatical might be a bit more popular than Uplay. We know about 2 links to it since March 2021 and only 2 links to Uplay. 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
I also assume you're new to PC, so if you are, you can get amazing deals on games via bundle sites, such as Humble Bundle, Fanatical, GreenManGaming, and etc as they sell game keys you can redeem via Epic, Steam, or etc... Most game keys are for Steam. Can use tool site to help find best deal on games isthereanydeal.com, please note games do go on sale, so don't be scared off by games full price tag as those are... Source: over 2 years ago
For cheap games, depends what games you want to look for, action, fighting, racing, what you looking for? There's also bundle sites that sell bunch of games for low price which are mostly sold Steam keys, which you can redeem on Steam. Such as humble bundle, fanatical, indie gala, or etc... Can use site like isthereanydeal.com to look for certain game deals as well. Source: about 3 years ago
Origin - Origin is your new digital playground. It’s where you go to find the best that EA has to offer.
Humble Bundle - Buy a bundle of games, you decide the price, and support charity in the process.
Epic Games - Computer game storefront that gives 88% of revenue to developers
The Indie Gala - Buy a bundle of games, you decide the price, and support charity in the process.
itch.io - An online game marketplace and community.
GOG Galaxy - Truly gamer friendly, DRM-free online gaming platform.