To be fair, it's not (overtly) trying to make the reverse claim but mostly sticking to the point about political advertising.
> "Corbyn’s aides sometimes demanded big spending on Facebook advertising for pet projects which Southsiders [officials at Labour HQ] regarded as a waste of money" Baldwin writes.
> He quotes an official explaining: "They wanted us to spend a fortune on some schemes like the one they had to encourage voter registration"
[...]
> A Labour source said [in response to this activity]: "At the next election, we’ll have a fantastic and co-operative party machine to match our incredible mass membership and popular policies.”
Unfortunately for Corbyn by the next election (three years earlier than expected) the attacks and undermining had got drastically more abusive and destructive, and the kind of people who think voter registration is a waste of money are now back in control of Labour.
In the 2019 election it was reported that "almost every Tory [Facebook ad was] dishonest, compared with none of Labour's"[1]; or as reported by the BBC - brazenly pro-Tory in the election[2] - dishonesty "across the party spectrum"[3].
[1] https://www.independent.co.uk/life-style/gadgets-and-tech/ne...
[2] https://www.theguardian.com/commentisfree/2019/dec/03/electi...