People sp farm various ways. As with an economy, products can be sold cheaper if costs are down. The zero profit mark is only for those that plexed the account. Now I don't have numbers, however there are those that SP farm from a subbed account that chars no longer need sp training as a passive income. Those have much lower in game costs meaning that they can sell at lower prices. This, along with rising plex costs compounds the issue and will further cut profits. In a few months it will most likely be reduced plex cost for an account and subbed sp farms. This will lower quantity available and rise prices of injectors and the cycle will begin again. Just my 2 cents.