Why has Helium been delisted?

I'm curious to understand the circumstances surrounding the recent delisting of Helium from major exchanges. Could you elaborate on the specific reasons behind this decision? Was it due to a lack of liquidity, compliance issues, or perhaps a shift in the exchange's strategic priorities? Additionally, how does this delisting affect investors and holders of Helium? What options do they have now in terms of trading and accessing their holdings? Clarifying these details would provide valuable insights into the dynamics of cryptocurrency listings and delistings.