If the judgement is only a summary, are there more detailed records elsewhere? Presumably future lawyers and judges will refer to this case
The judgement gives the legal reasoning in full. Future lawyers and judges will refer to that. It is unlikely they will need the full evidence. If they need that they will have to refer to the transcript (which is not usually publicly available).
So any man can pay other men to say they did something with a woman and that's fucking evidence
To repeat, the police and the press regularly put up rewards for people providing information leading to a conviction. The police also sometimes make offers to people in prison in return for giving evidence against others - one of the reasons alleged jailhouse confessions should be treated with suspicion. The jury will be encouraged to take any payment into account in determining how much weight (if any) to give the evidence. The presence or otherwise of corroborating evidence is also a factor. In this case there was some corroborating evidence for both the new witnesses.
the message given is that to avoid a charge of rape you just need to find somebody to confirm that the victim said a phrase that is so common that its almost something people say out of politeness
You have to convince a jury that the similarities between the accused's description of the alleged rape and the descriptions of consensual sex given by other partners of the victim are enough to say that the accused clearly knows how the victim behaves when having consensual sex. Do you really think that 12 ordinary men and women are going to decide that based on use of a common phrase?
Look at the words of the witnesses before and after money offers were chucked at them
There is no evidence that money offers were "chucked at them". There is no conflict between their original statements and their current statements. The only difference is that originally they were not asked about details of the victim's behaviour during their sexual encounters with her and did not volunteer that information. I am not saying I believe them but a jury heard all the evidence and decided they were credible, as did the Court of Appeal.
So, basically he is free because the jury believed:
We don't know exactly what the jury believed and never will. All we can say for sure is that either they concluded that she consented and was not too drunk to consent (which, on the evidence, would seem to be in line with R v Bree, a case which went to the Court of Appeal and is viewed as the leading authority on consent whilst intoxicated) or that Evans reasonably believed that she was not too drunk to consent. I think the latter is unlikely as, on the evidence, Evans does not appear to have spent enough time with her to form a reasonable belief.