New Blood cards do that anyway as a part of their natural cycle, and given the new clan they did so even more. With the exception of the said new clan that went up by roughly 100% each when their Ld was released.
Cr speculation - people didn't guess right and started dropping all their stuff on the market. Also people sold their stuff early to get the new clan ASAP after release.
In future use this area of the forum http://www.urban-rivals.com/en/community/forum/?mode=viewtheme&id_theme=4