This is a weird question, we don't know what would happen to any of them. If Jay never met Ty-ty he might've been working at Microsoft for all we know.
When they first got together they both did the same numbers and they've been doing the same numbers since then in terms of sales. Sometimes Jay moves more, sometimes less at least in the US.
No one is buying Jay-z albums due to Beyonce or vice versa. And his business moves have nothing to do with Beyonce, more like Steve Stoute, Jay Brown and those type of people. As far as international fame outside of music, yes Beyonce has obviously helped that. Just like it has helped Beyonce by being in a "power couple".
And her letting Jay-z takeover her career from her father was the best thing she ever did in terms of focusing on putting out dope music, real issues and becoming a respected legend instead of a girly airhead who just put out a bunch of mediocre hits in which she had no creative input. No one knows what changed that.
Is that why he's been filling tours and headlining festivals for like 10 years in several European countries
. Cause unknown people usually do that.
What has helped Jay-z the most is him putting out big pop songs, that's what takes your world wide. Dirt off your shoulder targets hiphop fans, ESOM and Forever Young etc targets pop fans. But in 2016, any dope hiphop targets pop fans.
