The Dangleway had 2.4m "rides" in its first year of operation (source TfL data posted to London Datastore). I keep a spreadsheet with all the modal passenger usage numbers in it. TfL provide 4 weekly updates to the London Datastore - it's all online.
I've spotted a few bits about it knocking about online. It's seems around 8million journeys have been made on the network during the first year with service provision costing around £20.5million.
That equates to a journey cost of £2.56 so I would expect LU at least covered its costs when fare revenues are taken into account. Also, whenever a new business venture is started the first year rarely makes loads of money. I reckon even Dragons Den might be happy with those numbers for the first year.