Exponential growth is a term often used by start-ups in pitch decks, but rarely achieved. Dublin-headquartered Wayflyer, however, is among that rare breed.  In its first month’s trading in April, it loaned $600,000 in short-term finance to rapidly growing e-commerce companies, and last month the figure was $12 million. This month, which includes today’s Black Friday, will be another step up again. By March next year, Wayflyer expects to have crossed the $100 million lending mark.  Its lending cycles are fast, measured in weeks or months, versus traditional lenders who think in years or decades. Wayflyer is helping e-commerce businesses…