If you truly cannot afford the $8, use the "separate microphone" trick or the Linux dual-boot suggestion. If you can afford the headphones, you can afford the driver that makes them work.
with no functional restrictions. After this period, the driver will stop outputting sound until a license is applied. How to Purchase and Activate alternative a2dp driver license key
It sounds like you're looking for an interesting review of the — specifically regarding its license key system. If you truly cannot afford the $8, use