Confirming I just got an email from Centurion:
Transfer 250,001 ~ 500,000 MR to Velocity, get 25% bonus, Gold Velocity Status until May 2019.
Transfer 500,001 ~ 750,000 MR to Velocity, get 30% bonus, Platinum Velocity Status until May 2019.
Unsure if Platinum Charge is the same. Probably...