So here are my questions.
1. Is oneminers a scam mining company?
All the red flags indicate that Oneminers is indeed a
SCAM. In addition to [
this] discussion on Reddit, users have pointed out that it is a Ponzi scheme.
Also, sources like [
Scamadviser] and my own research suggest that what helped Oneminers spread its fraudulent scheme was the positive reviews promoted on YouTube, as well as fake positive ratings on review platforms like Reviews.io and Trustpilot.
Thanks for additional links, although IMO scamadviser isn't exactly convincing when their "Negative highlights" is rather vague.