Someone is also buying. You can't unload without buyers. Let's all keep in mind this is still the OTC market. Many shady things go on supervised it's part of being on this exchange.
We don't know whether some one is loading it or unloading it. The price went down from $6.30 to $3.00 in just about a couple of days in March. Then after couple of more days Ackman announced that he increased his position in FnF.