Bottom line isn't all that matters... why did the other 500 leave you? did they find out they were getting ripped off? did they find that your competitor offered the same services, but yet was friendlier? or did you commit some socially unacceptible action, club baby seals, run over people's grandmothers... and so they left you?
If the 1000 people at $1 profit, like your service, and find you competitive, they can be a positive force in getting additional people to come to your service. etc...
so.. 500 talking nasty about you, waiting for the next "oops" to just dump you for something/anything else? Or 1000 people that talk highly of your services, extol your virtues, the bible reading you gave last week at the pie social...