Yes. If your PlaceMaker subscription license includes imagery tile credits (such as a Commercial License), you are then able to download a set amount of DigitalGlobe tiles during the term of your subscription.
The PlaceMaker team pays licensing fees to DigitalGlobe for access to the aerials in order for our customers to be able to legally use the imagery in their SketchUp projects.
Imagery from other providers such as Nearmap are not included with your license purchase. Tile credits for accessing this imagery must be purchased separately.