That might make the first reuse flight unprofitable for SpaceX, but not as unprofitable as one with no payload.
See this here for a series of graphs of how big their launch backlog has grown over the years: http://www.americaspace.com/?p=93456
This means that launching customer payloads on fresh-built rockets is Priority #1, at least until confidence is fully restored, cadence is up, and backlog is down.
edit: you might see a commercial flight with a never-flown-before prototype commercial satellite bus (example: like a geostationary bus the size of a boeing 702 with a novel never before tested type of ion propulsion stationkeeping system, or a new battery system, or something else weird).
Insurers seem to be playing a bit loose with SpaceX:
>This insurance official said that given the market’s current softness, underwriters have overlooked the fact that they are not always sure what modifications have been made to the Falcon 9 they are insuring.
http://spacenews.com/spacex-to-brief-underwriters-on-the-roa...
SpaceX claims several customers have volunteered to be first. I don't think we're going to see a test payload unless SpaceX is concerned there's such a high chance of failure the PR hit would be to big to risk it.