Why would you want to port out of Freephoneline.ca?

I am going to treat this as a hypothetical!
I had the same concern with another VOIP provider when it came to porting to Speakout, a decent cell phone carrier. I gave Speakout all the info I had on the VOIP carrier, like my address and a contact number in case anything went south. Two days later, and I got a problem free, successful port.
I cannot see Freephoneline ever giving you a hard time if you want to leave with your number. Unlike incumbent telcos, Freephoneline is actually a straight up company, at least from my experiences with them. Besides, if you want to port out, they would have already got your $75, it is not like they have incentive to play dirty tricks to keep your number with them if you are not happy.