https://techcrunch.com/2019/08/05/spacex-will-now-offer-dedicated-rideshare-launches-for-small-satellites/

SpaceX is expanding its launch offerings with a new, more affordable and consistent option for small satellite operators looking to put lighter payloads into orbit. The new service offering is designed to work for customers who can take advantage of a “rideshare” launch, sharing space on a Falcon 9 with other small satellites being sent up.

The rideshare option will be offered on a regular, defined schedule, and SpaceX says that it’s designed for flexibility, offering customers the ability to pre-book a spot, and ensuring that if they’re ready to launch when their rideshare comes up, the rocket will indeed go up — with or without other payloads also booked that may not be ready in time.