Yeah, thks for the answer, but when they peer directly, they still need Telkom to supply those peering links, if they were all in the same building they can peer as much as they like, but I suppose JINX handles this anyway, & they probably have a big pipe going to London and America from there. Its quite funny Telkom not being at JINX, but at the London Pop, they are little guppies outside South Africa.
Either way they still pay for the peering links to JINX and there aren't many Tier 1 ISPs in SA anyway, basically only SAIX, IS and Verizon. Could actually work out more expensive to peer via JINX because if ISP1 wanted to peer with ISP 2 there'd have to be one link between ISP1 and JINX and then another between ISP2 and JINX as opposed to one direct link between them which they could share the cost of. I think JINX also introduced "equivalent line charges" for the ISPs that are based there anyway.