Reviewers and writers actually do get a stipend, but it's a token amount like 200 bucks a year. This industry is the most ass backward incentive structure we could possibly create, the only reason writers would provide articles to a journal is literally for the clout.
I've never gotten a stipend or heard of someone getting a stipend for publishing or reviewing manuscripts. The only thing I've been offered is access to the journal.
Depends on the journal I guess, my wife worked at multiple publishers and there's normally an insultingly small stipend for the editorial board members and writers