I've found in the past that if a company presents an onerous task for interviews, and isn't interested in paying directly for the work, sometimes they are willi

I've found in the past that if a company presents an onerous task for interviews, and isn't interested in paying directly for the work, sometimes they are willing to donate an equivalent sum to a non-profit of your choice. Of course, the fact that they won't pay directly is useful information when interviewing, by itself, but a donation can indicate respect for your investment of time and effort.