He’s famously flexible based on whatever he thinks is advantageous now. This could be as simple as his claims to have been unfairly persecuted by law enforcement, it could be part of his wealth gained from cryptocurrency, or it could simply be that he thinks it’ll make his opponents angry. Rich people often act on whims just to show that they have the power not to need to justify their actions.
It could be any of that, but it could also be as simple as libertarians requested it, he told them he would, and he didn't feel any reason to renege on that.
(I do think there's probably an element of deliberate disrespect to federal law enforcement and the justice system, but that alone doesn't answer the question why Ross specifically?)