Comment by gangstead

They may be supply constrained as well. Only one of the 3 Falcon launch pads can support Falcon Heavy and it must be reconfigured to go between regular and Falcon launches so each Heavy launch restricts Falcon launches for a week or two on either side. The second launch site at Vandenberg is being built right now and will support both regular and Heavy launches as well. For every other launch company reserving a launch site for a month for one launch wouldn't be a problem but for SpaceX that will prevent scheduling of 4-6 other Falcon launches.

SpaceX might be pricing Heavy launches high enough to dampen demand until they can support more launches.