Regarding Delta and AGPLv3: I'm not entirely convinced the current Delta terms are actually in violation of AGPLv3.
For context:
> Due to the licensing of emulator cores used by Delta, I have no choice but to distribute Delta under the AGPLv3 license. That being said, I explicitly give permission for anyone to use, modify, and distribute all my original code for this project in any form, with or without attribution, without fear of legal consequences — unless you plan to submit your app to Apple’s App Store, in which case written permission from me is explicitly required. Dependencies remain under their original licenses.
Basically, "I grant you the combined work under AGPLv3, plus an exception for my original code." You can make use of the exception iff either that original code is separable from the rest of the work or all other involved copyright holders grant identical exceptions. The "No further restrictions" clause can only apply to code that Riley Testut does not own and is using under the AGPLv3 license.