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The main issue here is whether the income is for services that you rendered, or if it is a benefit offered by the college for which you simply need to attend class. Since the income is being reported in box 3 on the form 1099-M, the college appears to consider it more in the nature of scholarship income rather than compensation for services, for which it would be reported in box 7.

I looks to me to be closer to scholarship income than anything else, so I think the last response in the link you shared would be most appropriate: