Follow
@sam coop is always measured by contribution so yes, either material (money, hardware, hosting) or non-material (time, effort) contribution. The question is always - what is the threshold (after which contribution is counted as substantial) and how to measure / evaluate non-material one to match the threshold.
@sam The threshold is usually - "comparable to others" that is for another person to become my partner in coop he needs to contribute at least not less than myself. If there are more of us - to average of others' contribution. Similar could be applied to non-material, conversion from one to another though is always problematic (because is subjective)