I think it's less about believing there is public interest or value in weaponising Rezuul's information, and more like Rezuul is someone tangentially associated with Phase who was probably easy to dox but wouldn't actually be in their books, so he's included in an attempt to discredit our assumptions that this information came from either someone on the inside or a company data breach. It's a distraction.
That being said if it was a Discord scrape then it might be someone who specifically has a grudge against Pippa, rather than Phase as a whole. It's obvious from the Henri drama that she takes people fucking with the company and her friends very personally, so if someone wanted to hurt her then going down the list of people she associates with would upset her significantly more than just using her own information and restarting the Zax and/or bald Russian timeloops for the thousandth time.