While CS2 has all the markings of a new game, it actually wasn't released separately alongside CSGO. CS2 completely replaced CSGO. You'll notice that it has taken over it's spot in the Steam store too. It's retained all previous reviews from CSGO and all CSGO skins and items are now CS2 skins and items.

Purchase and viewing of pay-per-view requires an ESPN+ subscription.

UFC 285 is exclusive to ESPN+, so if you're looking to stream this event, non-ESPN+ subscribers will need to sign up for ESPN+ (monthly or annual) and then purchase UFC 285, as PPVs are only available to ESPN+ subscribers.