Because for big SaaS (international) companies, managing your own infrastructure can be hard or borderline impossible. Each country has regulation regarding data centers, each must have disaster recovery and scheduled backup, each must have redundancy to the max, and many other things to consider when hosting on your own infrastructure. Meanwhile you can use that money to pay developers instead of paying someone to wrestle with server stuff.
Because for big SaaS (international) companies, managing your own infrastructure can be hard or borderline impossible. Each country has regulation regarding data centers, each must have disaster recovery and scheduled backup, each must have redundancy to the max, and many other things to consider when hosting on your own infrastructure. Meanwhile you can use that money to pay developers instead of paying someone to wrestle with server stuff.
But yet they only develop garbage.