So you screwed them with ICO and coin now you want to screw them again selling there email address.Will be surprised if you don't get red feedback.
If you had read the Unum ANN thread you would be informed enough to know that the IPO was 100% free, (anyone who submitted their email was given coins) so there was 0 that we as developers made on the coin, 100% of the pre-mine was distributed 100% freely.