The mergers, both local and international, are part of an ongoing drive to get profitable or at least stem the haemorrhage of the red stuff. In this case it is suggested that the two will stick to their knitting, UIA's being the corporate market, MWeb's the consumer. This makes a lot of sense. But consider the issue a little more carefully. When MWeb bought Pix Internet some months back, Pix users were automatically transferred to the MWeb front page when they connected.
Internet companies know the value of default pages.
This means that only in the case of new accounts will the default settings point to MWeb. But not so. The others go where their browsers now point. The curious thing about most news reports about MWeb is that they fail to mention what is now the most striking feature about the company, the impressive losses which it is making. So Amazon and MWeb's losses are in the same ballpark even though the former is chasing the entire internet as its market, MWeb just the tiny ZA fraction.