While technically $8 USD for 5 yrs, that figure is a bit misleading given how the cashback is handled. Still cheap though.
Can't comment on the performance, from a quick scout it seems to be not the best but not rubbish.
edit: You also get 2TB of encrypted cloud storage.
Cashback is eligible for new Ivacy VPN customers only.
Cashback may be ineligible if using codes not listed on Cashrewards.
Cashback is calculated and paid on the advertised cost of the plan only. It will not include any GST, taxes, credit card or PayPal surcharges.
The amount that tracks to your Cashrewards account may differ to the paid amount due to international exchange rates. Your initial payment is converted to USD, then converted back to AUD when reported to us. The advertised cashback rate is based on the reported amount, not the paid amount. Cashrewards has no control over this process.