I bet the idea is to use the deposits to fund margin lending to offer 3% interest rate. I remember the rate was like $10/m for $2000 margin which is 6% per year

I bet the idea is to use the deposits to fund margin lending to offer 3% interest rate. I remember the rate was like $10/m for $2000 margin which is 6% per year. If it’s funding margin lending would it count as empty brokerage account to get insured?