They don't charge a higher price for the domain they are front-running. If I were on a jury, I couldn't award any damages on it. If they raised the price, sure. But they don't, so I couldn't.
To me, it is a reasonable argument that they are protecting their customers. They run a store, and the transaction in their store begins with a customer searching for a domain. It "could" be reasonable for them to assume that the customer intends to complete their transaction, on their site.
They are not raising the price. If you are smart enough to know that you can get the domain much cheaper elsewhere, why are you using their site?
There could be an argument that there is a risk that a domain squater will scoop up the domain as soon as netsol drops it, and then you will never get it. But that only reinforces netsols argument for front-running.
But if someone was dumb enough to use them, then sued based on the deceptive "add ons", I would have to award a judgement. Their site looks like it makes it pretty tough to get through an order without adding something by mistake. I don't think I have ever seen a site where you have to uncheck so many boxes and hit "no thanks" so many times, just to prevent getting ripped off even worse.
I have a little bit of an idea of what I am doing, but their order page made me think "oh, they cut their price to $9" (but only for a second).