There are workarounds. You actually CAN buy a bulk filament and using it in the Cube, it seems.
All that it requires is a bit of willingness to do an undetectable violation of an effectively unenforceable law.
Virtually certainly yes.
The stress-strain curve of this kind of systems leads to the users yielding to hacks.
If it is a standard NFC, you can dump the content of the chip on the cartridge, and compare chips from several cartridges. Then try a replay attack, and/or generate your own chip IDs. There are quite some NFC-hacking frameworks out there, and e.g. Kali Linux with a suitable hardware dongle with the right NFC read/write chip can emulate the cards with apparent ease.
