No it’s absolutely not! The Ponzi scheme is recognised by a cashflow from later users coming to early users. We do not have anything common to that scheme. Just some rewards for angels, partners and venture investors. And a solid business model. All rewards are replicated from an ordinary offline business lifecycle.
And if only 100M tokens will ever be created then an ICO participant’s position should not be deflated at all by new investors. An investor’s total share can only stay the same or get greater. ICO investors’ tokens cannot devalue since we plan to never issue any more STE tokens.