People really sign up without reading Terms of Conditions and then complain when GitHub decides to do something with the data that you've given them permission to use under the ToS
A tiny percentage (less than 1%) [0]of people read terms and conditions- they are long, repetitive and often in legal language. If you expect to read every terms and conditions and privacy policy (and every change there of), you would waste over 240 hours over the year.[1]
[0] Bakos, Y., Marotta-Wurgler, F. and Trossen, D. R. (2014) ‘Does Anyone Read the Fine Print? Consumer Attention to Standard-Form Contracts’, The Journal of Legal Studies, 43(1), pp. 1–35. doi: 10.1086/674424.
[1] McDonald, A. M. and Cranor, L. F. (2008) ‘The Cost of Reading Privacy Policies’, A Journal of Law and Policy for the Information Society, 4(3), pp. 543–568.