Smart Lynx don't offer proper contracts, rosters or salaries. All through agencies. Some crew were with Mountain High Crawley in the U.K and were never paid correctly or final payments when they were let go.
As mentioned they are using a Dubai agency now for employment contracts. No benefits such as retirement etc.
They make money out of the type ratings and don't always offer employment at the end.
If they operate in the U.K this year, I am sure U.K immigration will be checking if the respective people have the required work status now Brexit has happened too.