XRL are ERC-20 tokens right? And since you already distributed them everyone can do with it what they want, including trading on exchanges if the exchange allows ERC-20 coin trading from your official contract address? Seems totally legit to me. Not sure how you were going to distinguish ‘official’ from ‘non-official’ listings.
The last trade I see on that exchange values the Rialto fund at 20M USD, which is almost 3 times more than the actual value of your ICO assets now.