Good news from Frankfurt. CryEngine soon will be updated and as developer says, it will be a major change to licencing and free SDK. The news says:
[…] This week also sees a major update to Crytek’s free CRYENGINE® SDK; granting non-commercial users access to a raft of the new features that recently helped to make Crysis 3 a visual benchmark for gaming.
Sounds great! More information can be found in official Crytek news page.