Most of those in T21 haven't travelled half way round the world. They come from other Asean countries or places like China, South Korea, Taiwan and Hong Kong. That end of 2nd Rd mostly caters to the same market.
Westerners, South Asians and Russians do visit as well but not in as great numbers.
It appears to be the case that the mall's initial popularity took the owners by surprise because they had to build a second multi-storey car park.