Could you explain what these backdoors are?
India–Singapore Comprehensive Economic Cooperation Agreement - https://en.m.wikipedia.org/wiki/India%E2%80%93Singapore_Comp...
AGREEMENT FOR AVOIDABLE OF DOUBLE TAXATION AND PREVENTION OF FISCAL EVASION WITH MAURITIUS - https://incometaxindia.gov.in/dtaa/108690000000000054.htm
Also, the Marutius backdoor was apparently closed in 2017 [0], which explains why I've seen the growth in Singapore incorporation.
[0] - https://www.squirepattonboggs.com/~/media/files/insights/pub...