Sure Critic states that its reviewers are "verified as actual customers." Here is how it is achieved. Your service shop subscribing to Sure Critic releases its customer information to Sure Critic, who uses emails from that list to send repeated "tell us how we did" solicitations on the behalf of the shop and picks the better ones to post. A customer tends to write a positive review knowing it is associated with his or her own identifiers, so to prevent any retaliation at the next visit to the same repair shop.
Another concern is that the service shops do not disclose their subscriptions to the 3rd-party services for your consent to releasing of your information (name, address, phone, email, VIN, license plate, make/model). The scope of using of your info is not limited and the info can be used and shared perpetually.
Repair shops should do a good job, use ethics, and rely on reviews posted directly by the customers instead of subscribing for finagling of the reviews in exchange for customers' information!