As a fan, my aim is to go to as many games as I can, especially in the ECC. I do not believe I would have the money and time to travel to SA for games if we were to get an SA team in our pool, especially it was to happen every season (unlikely I know). But it would get even harder to attend if we were to get a team in the knockout stages or a final was to be hosted there. We get very limited time to prepare for the knock out games as it is making it logistically very hard to attend these games and can sometimes cost a bomb. For example 2 years ago we played Clermont away at Saint Ettiene in the semi-final and it made it very hard to attend as there are not great connections between London and Saint Ettiene especially as there were about 3 weeks to prepare so a lot of our fans could not attend (what fans? we don't have any do we?) and that was only in France if we were to play a semi in SA there would be even less, maybe travel would not be too much of an issue in terms of actually getting there but it would no doubt cost an arm and a leg and you would almost certainly not be able to justify going all that way just for a weekend or in and out in one day.
I know for some SA fans this might be a non-argument as you guys play in Super Rugby and therefore do not travel to many away games and as I have read on here some home games can be hard to attend (involving lots of driving) but part of the magic of the ECC is the travelling and meeting fans from other countries especially on away days and I feel having SA teams will detract from that severely from a personal point of view.
I have nothing against playing SH teams and would love to see it, just not in the ECC. A World Club Cup similar to FIFA's or an International Challange like in League would be better.