ecivfesrire, normal business owners and managers would not do it, but the world is full of scammers, who are happy to grab even 10,000 and run away. 50,000 is a gold mine. What happens then is a sad story for all creditors, who have been scammed. Bankruptcy procedure begins, business has no remaining assets, director is unknown or "shabby" and recovery is unlikely. That is the worst case scenario.
Businesses will be vetted in advance of using the platform to make sure they are at least legitimate, operating companies. Of course, this doesn't mean there's guarantee of repayment, but it should greatly reduce the risk of fraud. Plus, the invoices will be insured by an institutional insurer, who I assume will be doing their own vetting as well.