Maybe this is true for some regions, but in general the reason was money. SMS costs money, Whatsapp intially had a low one time or annual fee that was way below what you used to pay for a few SMS, but you got better service than MMS for that fee. And now it’s free and sustained by network effects.

What’s the significance of the colors? Greenish = “stealing”, orange = “okay”, yellow = “grey area”? Seems awfully negative, maybe invert the whole thing.

Is it at least their cat?