The program was mostly for people who were intimidated by retirement planning and who had very little to start out contributing. myRA let you start with $25 and put in tiny increments, as small as $5. These were then invested in the
TSP G fund, not just ordinary savings bonds or a savings account.
By comparison, a Vanguard IRA will let you start with any amount as long as you set up direct deposit, but the minimum fund amount is typically $1,000. That takes an awful long time to get to with $5 per week, and in the mean time your money is sitting in a money market fund earning nothing.