If you close the IBox and then look at the upper right corner of the page it says "Boardmarks". The number is the amount of people who have added the SDVI page to their favorites. The more people who add the page as their favorite might translate into more investors..
The IHUB pages with very large numbers of Boardmarks usually have very high daily volume. It isn't always true but could be used as a good metric to gauge how popular a stock is on IHUB.
I think the Friday Boardmarks were around 172 and now they are at 205 and growing...