This is the definition I found. Whether this actually applies to INKW I do not know, just what I read on this site previously.
Pink limited is per Investopedia.com:
Limited Information companies include troubled firms in financial distress, bankruptcy, or those with accounting issues. This category also includes companies that are unwilling to meet the OTC Pink Basic Disclosure Guidelines. No Information companies are those businesses that do not provide any disclosure at all.Aug 18, 2021