Mallah, Adobe would take the view that you are asking us to help you steal their software.
They only sell as a subscription now, that is their prerogative (as much as I think it sucks as a way to do business). There are alternatives to most adobe software out there, some takes a bit more time to master than others but most is genuinely free GIMP replacing Photoshop for example.
Using a serial, or key that you get from anywhere other than Adobe is a breach of copyright, and arguably a breach of international conventions on breaking encryption. Using software to crack as key is absolutely against UK law.
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