Ends tonight.
Looks like you just need to remain connected for 2 weeks (10 business days) then you can switch away.
T&Cs from the site:
*Terms and Conditions - $100 Virtual Visa Gift Card
This offer is valid from November 22nd 2016 until 11:59 pm AEST November 25th 2016 to new Click Energy customers in NSW, QLD, SA and VIC.
New customers who sign up with the promocode SOLARFRENZY and remain connected for a minimum of 10 business days will be entitled to a $100 Virtual Visa Gift Card.
You will be able to activate your Digital Virtual Visa Gift Card via a unique redemption code that will be emailed to you. This redemption code will be provided approximately 14 business days after you become a billable customer of Click Energy.
The vouchers will be valid for 6 months from activation date or when the entire value has been exhausted, whichever occurs first.
The voucher is not exchangeable for cash. Any unused portion at the end of 6 months will be forfeited.
If you are a current customer of Click Energy, you are eligible to receive this offer under the condition that you switch another property or fuel over to Click Energy that is not already billed by Click Energy.
This offer is not available in conjunction with any other offer.
For full Virtual Visa Gift Card Terms & Conditions, visit https://virtualvc.com.au/Terms
can't seem to find a list of their rates?