Moved to a more appropriate business research oriented forum.
My understanding is that a 10-day trial is not sufficient to fully grasp the level of service a client will receive over long term. A more traditional 30-day period is more appropriate, and does not seem rushed.
Of course there have been companies that offered half a year to a year worth of free professional hosting to win customers over, but that's only good if you have deep pockets to finance your operation.
Another trick is to have people pay $1 for 30 or 60 days of trial hosting. That will eliminate those who just want a free ride.