this is a scam:

Please start your reading from here:

https://www.reddit.com/r/opusfoundation/comments/9d4g4v/opus_scam_mateusz_mach_in_uae_tax_free_living/

Evience:

1. After completing the ICO both Mach and Bokang (the CEO/COO) fled to the UAE and are in full time education. Check their LinkedIn profiles.
2. Philipp Siemek (Community Manager and Marketing Mgr) has also moved to Australia -full time education. Check his LinkedIn profile.
3. The Telegram chat channel is tightly censored. Users are banned frequently for asking financial questions.
4. All of the above are directors of Nextrope Ltd and NeXt Blockchain - two seperate companies. All Opus resources are shared with these companies. Is this where the ICO money has been spent? Opus Stream Ltd was actually renamed from Nextrope Ltd clearly mixing the entities.
5. No meaningful development progress for over 6 months (minor cosmetic updates only).
6. Bug ridden alpha release with about 2 artists featured.
7. Reports of several other artists being ignored by the team when they ask to join Opus.
8. CTO and the other 4 devs are all working on other projects. Nobody is full time on Opus.
9. Opus reddit is also heavily censored and anyone asking question about the team's other projects is banned and posts removed.

This is a stealth exit scam - these guys have other projects ongoing. They are using the Opus funds to support Nextrope Ld and their other ventures. Nobody is full time on this and the project will slowly die in a  year or so leaving the team to walk away with the funds and do as they wish.