"infinite scaling" means _exactly_ that. If you don't want people to use accepted dictionary definitions of words like "infinite", you should not use them in your marketing.
A few telcos here in Australia have recently lost court cases about their use of the word "infinite" in their cellphone plans/marketing, and then cutting off or charging extra to customers who "used too much". The court, rightly in my opinion, said that the meaning of the word "infinite" is clear and well known, and any claim that it included "limited, of course, by common sense" is bogus. Be careful of letting your marketing team write too much hyperbole - occasionally you'll be held legally accountable for it.
I suspect if the amount in dispute had been an order of magnitude or two larger, Jacques may well have had a strong enough case to find a no-win/no-fee lawyer to go into bat for him... I know I'd prefer not to have to explain to a judge how those first two boxes in the first column on the WPEngine homepage didn't cover all of Jacques complaints.
I can create an infinitely scalable server and you can come in and drop a sledge hammer on it...does that mean I shouldn't use the word.