so what happens with the illegal Haitians that have their hearing and are rejected as immigrants?

1)  Do they go back to the States?

2) Shipped back to Haiti?

3) Just disappear in Canada into the underground economy (drugs / sex / Construction)?  Then they can re-apply as refugees/immigrants after they have been in the country for a couple of years.

I would opine that option 3 is the highest option selected by the rejected refugees.  

Standard of living:   Undocumented in Canada > undocumented in Dominican Republic > Documented in Haiti 

Dominican Republic has hundreds of thousands undocumented Haitians that have no rights to medical or schools.   DR has it's own poor and a standard of living that all but DR's top %1 would be consider impoverished by Canadian standards.