Is Frankfurter GMBH a scam?

I found 10 Frankfurter GmbH listings - all of them investment companies. This is a scam. NO legitimate business advertises in the blind like this. And work-from-home scams are the biggest lie of all. I've been retired for 15 years and according to the Better Business Bureau, there are STILL no legitimate get-rich-quick...work-from-home businesses.