I asked that to Dimitri Chupryna in the telegram group and this is his answer verbatim:

"We are incorporated in Singapore and  follow the regulations and laws of Singapore. ICO activity might fall under other regulations in USA as well as many cryptocurrency activities are not defined.
so combination of facts excludes current possibility for USA citizens to participate in Initial coin offering to avoid possible legal incongruities. It is TaaS management decision that is based on our Legal team recommendations."