You don't need to be spending money on yourself for a fraud conviction.
I was on the jury of a federal fraud case, where the defendants took millions of dollars in customer funds and used it to make bad business decisions and/or placate earlier customers.
It was very clear to us that even though they lived a very simple life (old car, $1,500/month rented house), they wanted to build the biggest company in their industry, and fraudulently used their customer's funds to do it.
I was on the jury of a federal fraud case, where the defendants took millions of dollars in customer funds and used it to make bad business decisions and/or placate earlier customers.
It was very clear to us that even though they lived a very simple life (old car, $1,500/month rented house), they wanted to build the biggest company in their industry, and fraudulently used their customer's funds to do it.