The term "igstinked" is not widely recognized in Paleontology or scientific literature. If you meant to ask how a Spinosaurus became extinct, it is generally believed that factors such as climate changes, habitat loss, and competition for resources contributed to its extinction during the Late Cretaceous period. Additionally, a significant event like the asteroid impact that led to the mass extinction at the end of the Cretaceous likely played a crucial role in the decline of many dinosaur species, including Spinosaurus.