They'd sell if they needed the money or wanted to lower their dollar cost average or if they wanted to be riding all on freebies or if they just wanted to have profit on their side or if they wanted to lower their risk or if they saw another opportunity elsewhere promising a faster profit or any other of a number of reasons why, that's why....
Not everyone has a long term mentality in a pinksheet stock despite all the grand efforts of many "longs".
Personally, I feel that SPZI is a very compelling buy, has an excellent chance of reaching a penny plus pre-launch and afterwards several pennies and beyond, to speak very conservatively. Putting my money where my mouth is is why I have been a adding significantly.
Great long term hold here, for those with the foresight and patience!