I'll tell you what eroded the PPS. Aero was "never" worth more than .0001 - .0002 of a cent. It was hyped to .035 and then TANKED like most otcbb companies that appear eager to DUMP shares and BS investors. It is quite lucrative to never succeed as a business nor increase shareholder value, which is why this krap is so pervasive in the penny world. Of course, they do need to be careful, not too greedy, and file their taxes...LOL