Grind it out or go broke. The money is not great, but with enough clients, it can be livable. In screenplays, directorial elements are a no-no. Good practice to learn the craft. There's often cross-over between crew people who work in features and corporate.
Many corporate producers aspire to make no-budget features.
You're actually writing for the screen, getting paid, and seeing finished product. Plus a resume full of Fortune 500 writing credits is better than no resume if you're seeking an agent. The aim in corporate video is to make everything as clear and direct as possible. Screenplays impart information with subtlety - or even obscure or mislead. This was a terrible burden to undo when I started screenwriting.