Ok I see this is a company that does the service for a small fee
It posts that charges for a Dominican resident to get a visitor's visa to Canada is 150.00 US plus shipping.
But if you apply directly to the Canadian embassy in Santo Domingo it's 65.00 US.
http://www.dfait-maeci.gc.ca/latin-america/dominicanrepublic/visa/visas-en.asp#7
So since there's a very slim chance of getting a visitor's visa to Canada one may as well apply directly to the Canadian embassy. No point for a Dominican going through a US based company to get a visa for Canada.
But the site might be helpful for those in the US that don't know where to visit without a visa