Special Clickfunnels discount pricing is only available on your first invoice. After that, you have to pay regular Clickfunnels subscription charges i.e. $297/month for Clickfunnels Etison Suite or $97/month for Clickfunnels Startup Plan. However, the customer has the option to buy Funnel Hacks subscription for the maximum duration of 12 months through Paypal to get the maximum benefit from the deal.
Cons: The biggest issue for me is that all the work that is done on the Clickfunnels platform is at risk if they ever change their terms of service. I'm not saying that they ever would, but if company is ever sold, I could see a new owner possibly changing the fee structure or something like that. I've been stung before, so I believe this is a con compared to having your funnels in Wordpress. The other main con is the pricing. It's not cheap compared to similar functionality on Wordpress using a good quality theme.