Maybe if you put things into context that the Guardian is a loss making company on its print producing section and has been for some time. The profits it makes are mainly from its investments Auto Trader being one of them before it was sold. This is a case of moral judgement and that I am afraid there is no right or wrong answer.
A lot of the work the Guardian does in its reporting like on the panama papers, Sports Direct exploitation, and MP's sex scandal would be ignored by the largely right wing media that we have in this country. I don't agree with what the Guardian have done but on the other hand value the work that they do.