Little company has great product. Little company also has inexperienced, clumsy management.
Regulatory body favors big companies over little ones. Regulatory body now knows little companies product is legit. Big companies now know it too.

Frustration over treatment by Regulatory bodies drives SP down making it a cheap buyout target. Big company picks up a great product at a bargain price with help from regulatory body.
Once product is owned and renamed by Big Company approval is almost immediate.

Wash, Rinse. Repeat.