Choosing not to use a middleman any more so that you can secure higher margins sounds like about clearest example of a "legitimate business reason" imaginable. The purpose of the act is to immediately increase your margins, not to hurt Deliveroo because you don't want their competition.
That's very different from the case in question, where LinkedIn's motive for cutting off hiQ's access is to inflict damage on hiQ because they are a potential competitor.
That's very different from the case in question, where LinkedIn's motive for cutting off hiQ's access is to inflict damage on hiQ because they are a potential competitor.