" 3.3 You may not use the SDK for any purpose not expressly permitted by this License Agreement. Except to the extent required by applicable third party license

" 3.3 You may not use the SDK for any purpose not expressly permitted by this License Agreement. Except to the extent required by applicable third party licenses, you may not: (a) copy (except for backup purposes), modify, adapt, redistribute, decompile, reverse engineer, disassemble, or create derivative works of the SDK or any part of the SDK;" The part about not being allowed to reverse engineer seems to be the part of the license, which is most against free software principles. So IANAL, but actually understanding what a software does is, IMHO, the core of FOSS.