I see Standard Bank has reduced the minimum repayment due on their credit cards from 5% to 3% of the outstanding balance. This is because

Given the current economic climate, customers are keen to find ways of reducing their monthly spending and are open to the idea of being able to repay less on credit-related accounts without going into arrears.

...further on...

This change may help you to manage your monthly expenses more efficiently.
I guess - as long as you don't consider their interest charges as an expense

I'm quietly wondering what percentage of that repayment would actually end up going to capital.

What interest rate are credit cards typically charging at the moment?