Are flags a fad? Those flapping bits of cloth have seen their day, and at least Landmark is calling an end to their use.
A small bugfix patch released today eliminated the need for build site flags, with the same functionality being moved to the site management UI. The changes stemming from this move were made so that players would have an easier time managing their claims. The patch also added the option to convert lumens to building materials if you’re running short.
If the patch seems a little measly to you, don’t fret: Daybreak says that a “larger” update is in the works for late July.
Source: Patch notes