There absolutely is DRM in MQA. I can't freely copy the unfolded or rendered, full-resolution MQA file - I can only stream it through my MQA DAC, which DAC has a Bob Stuart tax incorporated into its purchase price.
No. Licensing for hardware decoding has nothing to do with rights management of the content. DRM is designed to protect the rights of the content owners, not hardware makers. To the extent you can freely copy any MQA content as purchased, then it has no "rights management."
Licensing to decode MQA is no different than license to activate Windows. Or use your phone on a carrier.
And you don't need to freely copy output of your DAC as that is analog anyway. You are free to give me a copy of said file and I can play it without paying the license holders. I can play that file without MQA decoding, or with.
The fact that you have issue with MQA making licensing fees has nothing to do with "DRM." Video codecs have licenses. Every TV you buy pays for these licenses. Every Blu-ray player pays for these license. They also then add DRM so the original content can't be distributed without authorization. No such thing exists in MQA yet you consume content on your PC/BD player, but complain about MQA?