Collaboration etiquette - what producers and artists should know

After many collaborations through beatcorelab, here are my unwritten rules: 1. Communicate clearly about expectations BEFORE starting 2. Set deadlines and stick to them 3. Credit everyone properly 4. If money is involved, agree on splits upfront 5. Be responsive - ghosting is the worst beatcorelab's Connection feature makes initial contact easy, but the collaboration itself requires professionalism. Respect each other's time and talent. What collaboration horror stories (or success stories) do you have?