Warehouse-type buildings useless

[Sphinx]

I'm talking about Energy Vortex, Fuel Tank, Agro colony, Hydroponic Garden and Earth Chakra.

I haven't seen anyone build them and i don't see the reason to.

Any thoughts?

[Napoleon]

I use the manpower faster than I can build it to store it, so personally, they are purposeless kinda.

If they acted like collectors like clash of clans has, it may make more sense.

[Loki]

That is because there is 100 of you