The Guardian has 655,000 regular monthly supporters

"The Guardian and the Observer have broken even for the first time in recent history aided by record online traffic, reduced costs and increased financial contributions from readers.
Guardian News & Media recorded an £800,000 operating profit for the 2018-19 financial year – compared with a £57m loss three years previously – ensuring the business is existing on a sustainable basis following the culmination of a turnaround programme put in place following years of substantial losses.
The company said it had 655,000 regular monthly supporters across both print and digital, with a further 300,000 people making one-off contributions in the last year alone.
The Guardian has taken the decision to keep its journalism outside a paywall, while asking readers to contribute in order to subsidise its reporting into topics such as Cambridge Analytica, the Windrush scandal, and the Paradise Papers.
Total monthly page views increased over the last three years from 790m in January 2016 to 1.35bn in March 2019."

Source:  The Guardian, 1st May 2019

Note - it's not clear whether the 'regular monthly supporters' includes subscribers - I assume that it does.