The company's website further explains how the lunar burials will work: "You receive a kit containing a custom ash capsule to collect a cremated remains sample. After we receive the ash capsule back from you, we place your capsule in the Elysium memorial spacecraft. The latter is eventually integrated to the Astrobotic lander during the designated integration event. From here, the lander is integrated onto the launch vehicle. On launch day, the remains are carried to the moon where the lander will be deployed to its dedicated location, preserving our memorial spacecraft for eternity." Because Elysium can only send a small portion of cremated remains to the moon (less than a gram), participants aren't actually paying to have their loved ones literally buried on the moon. However, this has not deterred the company from launching the service, charging $11,950 per "burial".
If we're eventually forced to deploy large-scale geoengineering projects to combat climate change, it's not a good idea to grab whatever technology is cheapest or most readily available without knowing how well it works. The group is aware of the ethical concerns surrounding such research, but its director notes, "The fact is humanity is already engaged in unplanned climate engineering. We're doing it through coal plant and shipping emissions every day without understanding it very well."