As the engines are ablative, what are the implications of a scrubbed launch?
None. The engines are ablative but have a life significantly longer than required to get to orbit. Starting and stopping is harder on a rocket engine than continuous firing. Nonetheless, most of our testing to date has been with sequences of short duration burn that have worked very well. A scrubbed launch prior to ignition is no problem. In general, a scrubbed launch in the very brief period between ignition and lift-off is acceptable, although probably not a good thing. In this case, the launcher could be used again. An abort in the first few seconds after lift-off is not a good idea in any launch system and typically results in a very efficient transformation of both launcher and payload into small pieces and combustion by-products.