I imagine they built these a long time ago (anticipating fewer test flight problems) and have probably improved the design since then making these obsolete. They are going to build thousands so they can't be too precious.
Around 20 minutes into the flight, they deploy 20x v3 sats. Google search tells me those cost more than 1M USD each. Yikes... they burned up 20M USD for a "few tests". Damn, space is expensive! The official video says that SpaceX only had twenty minutes to test the deployed sats before they fall back to the atmosphere.