> Not to mention that it adds a degree of precision not present in the simple paid.

Well, I mean ... I'm not looking to condemn the word, however clunky it may be. But I do find this one amusing because the usage of 'paid' doesn't have a lot to do with 'postpaid' - afterall you pay *afterwards - so its a contract where the payment for services is subsequent to their utilisation. To couple 'post-' with the past tense(!) of 'to pay' for this purpose is just classic, IMO. The tense just jars with the original meaning. I do enjoy these new prefixed words though, like 'prepone'.