Foreigners are familiar with social media, but they are not familiar with the OTC market, as the US is the only industrialized country that permits such trading.
Over and over I hear foreigners who are absolutely perplexed that non-registered companies are allowed to trade publicly. In many cases, it seems beyond comprehension, so they somehow assume any US company is of decent quality just by the fact that is permitted to trade. They are used to more highly regulated Exchange trading which is all they know in their countries.