The reality is, as I'm sure I've pointed out before, that the IPA already sits on a piggy bank of cash that's been increasing substantially over the last 5 years. Here, look at this page from their 2014/15 report:
And for all of that, what did they get? A Liberal PM who made promises directly to them that he didn't keep. And even he's supporting the new PM in the superannuation changes the fight against which is supposed to be the rallying point for new membership.
If the IPA wants to run an advertising campaign supporting the ALP on this issue (lulz), why don't members (new or existing) tell them to use their growing cash reserves to cover it?