I can 100% confirm anything from Sully's is legit and they will donate all the proceeds to charity. They are super good people and in one way or another have been amazing customers of mine for 15+ years.
as someone who has not watched the news or looked up CNN, Huffington, etc, for 2 weeks and just had little bits through friends and fb, I had no idea there was a motto. 'boston strong'. I get it - hope that all the proceeds go to victims and medical bills. just makes me aware how the media can spread something so fast.