No. As a nanny on CanadianNanny.ca, it is not a requirement for you to purchase a subscription. This is because all families seeking nannies must purchase subscriptions for their profile to be visible. Because of this, nannies are granted unlimited communication with all families whose profiles appear on site.
That being said, there are optional subscriptions available for nannies to help improve their chances of finding a match. By purchasing a subscription, you become a 'Featured' user, placing you higher in the search results.
You can purchase a subscription during your initial registration or after you have already created your account. For more information on how to do this, see the below articles: