Good point 
When I developed SupraBitcoin, it seemed to me that Blockchain was easier to implement.
I did not know much about the Bitcoin transactions services for websites, so I chose one of the most famous during the development phase. Since the service worked perfectly, I had no particular reason to change.
If Blockchain doesn't solve the problem quickly or if I have enough free time, I intend to run my own bitcoind.

For information, I placed a warning on the game page to alert users to possible delays when they add funds.