That wording implies an asset sale which is for anyone involved in or doing business with Fig a big difference. In that case existing ownership and obligations stay with the original entity (probably something like Fig Inc, Delaware corp), the whole team gets hired on at Amazon, Amazon buys the tech they want for some payment the Fig board signs off on, and then someone goes in to clean up and wind down Fig Inc. It's common when big companies buy much smaller companies because doing a full purchase can be a lot more complicated.