So the first Kasa you buy for $10 plus the driver is STILL $10 less than 1 Control4 unit.
The second, third, fourth.... are $10 EACH!
That's some good math.
Pick one of the main three (Kasa, Govee, Shelly), and support their development!
Without a third party store, and the incentive of money attached, the sandbox of third party drivers would be crazy small.
Without a third party store, and programmers learning on paid, the number of vendors paying one of them to develop free drivers, would be crazy small.
And, without 3rd party programmers to write drivers for vendors to give away, then many of them wouldn't pursue a driver at all.
Edit
Why doesn't Control4 write them? their not going to cannibalize their own product sales, oh, and Support!
Why doesn't Kasa? We're making a $1 a plug, no free sauces.