Shirely, that ain't never gonna fly!?
Hypothetical situation, you download 2.4 - agree to the T&Cs - you're impressed by what's available and decide to buy a $150 spaceship - let's say that due to website load you get billed for 10 instead of just the 1 - you contact support, they refuse to refund you - your bank are equally useless - according to the T&Cs you are now prohibited to seek recompense in a court of law. LOL like hell...
Also, if your previous T&Cs describe purchases as 'payments' then I'd be surprised if they could retroactively be renamed to 'pledges'. Couldn't the existence of the word in previous T&Cs also be used as proof that CIG do/did consider them as payments?
Kickstarters, gofundme, ie crowdfunding platforms take pledges, it's not something you get in a virtual shop and 'buy now' must refer to the sale of an item, not the pledging towards an item.
I hate the twisting in all of this nonsense. Customers are not pledging, customers are buying on the back of Roberts' pledge (his word) that he will deliver the items you are handing money over for. The giving and the receiving of money is the entering of a contract (the customer has already fulfilled their side of it), the other party has to uphold their end of the contract or you're legally entitled to seek recompense despite anything their T&Cs might say.
If you enter a contract then there must be a reasonable expectation for date of delivery, even if that date is given as 10 years. People would not enter contracts with no end date, that's beyond reasonable expectations. So I would argue that their delay clause is null and void. You can't just take money and then say we'll do it when we can and even then it might be delayed