Just simple logic, when a stock like VLDI is in the sub penny level it is simply too risky to short, since the risk is great and the reward is negligible. you can only make less than a penny a share but you could easily lose three times that amount. The shorts if there were any to begin with covered a long time ago (the eight months before the recent run up to .027 where the stock traded in the low sub penny levels), but some may have shorted again at .027 level, but they are covering again in the sub penny level. That many account for the buying which some think is accumulating it any case the volume is minor.
Too bad retail can't short economically!
The important thing is not to stop questioning. Question everything (Albert Einstein), because Fools rush in where wise men never go!