For that you can blame players, not BB.
actually pvp units are very cheap
we have big problem with this production weeks, bb decrease time instead to increase output x2.
only problem here is price iron bars, before 1k iron bars was 100gc, with 100gc per 1k iron bars unit will be very cheap and pvp will be profitable.
after this stupid weeks finished everything will be normal again, but because of new loot will be some changes on market.
3 iron smleter lvl 5 need ~7k iron ore per day = 3500 iron bars per day with x2 buff
now we can get few K iron ore per day in adventures
also we don't need now many bakery, mills, farm so we can destroy some and build iron productions.
not many players have iron production that is reason why is iron very expensive.
now more players will start with iron productions.
if you have your own iron production unit for you are very cheap (you need 3 iron smelters and few iron mines + iron ore from loot).
i don't like pvp, because it's pve not pvp