Google did not buy and kill them. They died (for financial reasons) before they were sold for parts to Fitbit, who were later bought by Google.

https://en.wikipedia.org/wiki/Pebble_(watch)#Closing_of_Pebb...:

“On December 7, 2016, Pebble Technology filed for insolvency[82] with Fitbit acquiring much of the company's assets and some employees.”