Shocking how that finally got prioritized for the nation. And quick.
"Africa" is a continent, not a nation, and the very first sentence of the summary says this is "after more than a decade of planning."
I noticed that you don't cite precedence relevant to _this_ case - which is interesting as you seem to be claiming it exists. If I had to make a bet, I'd be pretty comfortable betting that you can't cite any or else you would have.
Note that people are free to leave this store at any time without a receipt and without purchasing anything, they just can't use any exit they happen to desire to use at any moment in time. There is of course an exception if they conducted themselves in a way that allowed management to invoke shopkeepers' privilege and detain the person for shoplifting - but that's true no matter how many exits are available.
Do you think you've been "kidnapped" when you drive into a parking lot and the barrier closes behind you and you have to proceed to another location to exit rather than simply backing up to leave?
The summary says merchant fees will reduce "by an average of 0.1% over several years" so I'd say the chances of this making anything cheaper at point of sale is on par with the sun going supernova in the next several minutes.
So when an elevator door closes on you the building owner has "kidnapped" you?
Did the subway operator "kidnap" you when the doors closed and locked behind you as the subway left the station?
Or when a business locks their entrance doors at closing time and leaves one "exit only" door open for customers leaving the business has "kidnapped" you?
It's not being "kidnapped" to voluntarily walk into a business where you can't exit through the same door you entered through.
As well, since this is a well known corporate store, they almost certainly comply with fire code at least to the extent of having emergency exits which must be unlocked an operable at virtually all times. Yes, they will set off an alarm, but if you're really being "kidnapped" that's an "emergency" and their use is justified.
A physicist is an atom's way of knowing about atoms. -- George Wald