A lot of people believe Rae wanted to go public with her relationship. Suspiciously, right around "collar-gate", information about them dating started to get more scarce. I think Rae realised the reasons why Hasan wanted to keep the relationship secret, from all the hate she got from just being associated with him.
Hasan's friends act and talk about him like he's single, because they understand the importance of him appearing single. Looking at the things some people do, like, I don't know, Destiny's community, doxxing Hasan and his entire family, what do you think they would do to someone they know is his partner? And especially also if it's someone in the public eye? They would go after that person so hard, trying to force Hasan to stop what his doing by threatening even more people that he loves.
I get why people don't want her to date Hasan. A lot of people don't like him, but if you parasocially care about Rae at all, like people pretend to, then does it matter who she dates as long as she's happy?
EDIT: Regarding the Valorant tournament, I just saw the total prize for all teams add up to $100K. It's not $100K for a single winner at the top. The first placed team gets a prize of $30K, which then has to be split between the 5 team members, which ends up to about $6K per person. That's not a terribly large amount of money to most of the people who participated. I don't think Rae is too broken up about the fact that she couldn't participate, and likely only wanted to do it for fun, not for the money.