One thing to note is pac money is less efficient than campaign money. Campaigns get the lowest rate for advertisements while pacs pay market rate. Super pacs technically can’t coordinate with campaigns so there isn’t a unified message, however the FEC is pretty toothless so any coordination would likely have to be very blatant for action to be taken. Their advertisements can also be overly biased by their ultra wealthy donors, ie something that musk cares about a lot may not have significant sway on the public which can cause said ad to be wasted.