That would only be because they are the only other large party. So for the majority of people/constituencies they are the best alternative if you want to vote to get the Tories out.
All they are doing is comparing the voting at the last general election, polling and then using that two give an option for the best way to vote them out.
Not sure what pro labour facts you think are on there
With these and the warranty repairs I bet they’re not even starting to earn back the development costs yet.
Wouldn’t be surprised if they’re at a loss so far.