That, and also some of those "sacked" Conservatives. They are still elected members of the House of Commons with voting rights. They wanted a deal, now one is on the table they can vote for. While e.g. the people Labour sacked over sexual harassment allegations will probably stay home.
And there is also the Lib Dems who are caught between a rock and a hard place, who might figure this deal is better than nothing.
And there is also the Lib Dems who are caught between a rock and a hard place, who might figure this deal is better than nothing.