Yeah I wasn't sure if you meant for the workers, the platforms or the consumers, haha. But, yeah, tips are the only thing that makes it viable for drivers, I think any delivery without a tip is at best break-even, but they need to accept any delivery they're offered to keep their ratings up high and so on. Cyclists can probably make more too, at the cost of higher risks of getting hit by a car...
There's a reason why these jobs are so popular with people who might not be able to find other jobs for various reasons.