You realise that South African game was part of the infamous double selling ticket policy? Where if you wanted a ticket to watch Ireland play South Africa, you also had to buy a ticket for the following weekend and watch them play Samoa. Which with the double price and the prospect of traveling for those outside of Dublin two weekends in a row is a fairly reasonable turnoff.
Its not really the best example to use considering its a widely accepted failed policy which they rectified immediately after that series of autumn internationals. In fact outrage and disappointment for this policy wouldn't have been so great had the ticket demand not been so high.