Asked the creator what this should be

Launchpad ? osm.wiki/Tag%3Aaeroway%3Dlaunchpad

The wikipedia entries seem to point to buildings : https://en.wikipedia.org/wiki/Uchinoura_Space_Center#Launch_pads

Probably the wrong house number ? This seems to be number 4 as of their homepage osm.org/relation/13031255

is this company here ? https://www.feelitmotorcycles.com

Massenhaft "campus"-Werte für einzelne Knoten https://taginfo.openstreetmap.org/keys/campus

17 Dec 2023 Starbase test stand A is taken down https://www.youtube.com/watch?v=rexInWhIFVE

"PFRR is owned by the University of Alaska Fairbanks (UAF) Geophysical Institute" https://en.wikipedia.org/wiki/Poker_Flat_Research_Range, so it's NOT "military"

tower and launchpad should be mapped separately, see osm.wiki/Tag:aeroway%3Dspaceport

Most likely not for (space) rockets, there are those alternatives : https://taginfo.openstreetmap.org/tags/weather_control=launchpad https://taginfo.openstreetmap.org/keys/aeroway%253Aballoon. There's currently no definition for suborbital amateur rockets. The minimum option to distinguish it would be https://taginfo.openstreetmap.org/tags/rocket%253Alaunch=suborbital