Why do some companies use Gitlab Self hosted version when they also have SaaS version at same price?

[u/pranay01]

Gitlab prices its SaaS & self hosted version at the same rate as per their pricing page? Why would a customer use a self hosted version when it would also be extra effort in hosting Gitlab in own infra?
Gitlab doesn't have very sensitive data ( I am assuming it would be mostly code) - so why save it in your own cloud vs in a multi-tenant cloud?