As always with the elaboration of legal agreements, the process was rather long and complicated, but here, the result is very positive. If I understand correctly (you'd better read the document, which is the only official version), anyone can use this data with the following few conditions:
- use must be conducted within the SPOT4 (Take5) project framework, to prepare for the use Sentinel-2 data.
- the data can not be resold, even after minor changes (this is normal, as they are freely available!)
- services can be marketed from these data, in the frame of SPOT4 (Take5) project, to prefigure the use of Sentinel-2 data.
- users must inform the CNES of how they use the data, and address any publication using these data to olivier.hagolle% cnes.fr and sylvia.sylvander %cnes.fr.
The document is here: License SPOT4 (Take5)