Pros: interesting research projects.
Cons: when things go wrong, you're left to hang in the wind
I worked in the Thought Leadership group, which does sponsored research - surveys and written reports - for large corporations and agencies.
There is a constant battle between what clients want in the reports and what a report carrying the EIU (Economist) brand is permitted to say. When the two sides disagree, the editor is left hanging in the wind. The rules are arbitrary, inconsistently enforced, and often based on ignorance of the subject matter and an assumption that the client is always wrong. The company's divisions are toxic along multiple dimensions: client vs editorial, editorial vs sales, magazine vs commercial, New York vs London, management vs line, editorial leadership vs editorial rank and file.
In terms of digital capabilities, welcome to the 1990s. You'll feel like you're working for your grandfather.