Updated advice. It’s a long shot, but it’s worth trying to force the Tories into third place. Share with your local friends.
Just be aware these sites often have a significant Labour bias, don’t take what they say as fact.
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
https://www.reddit.com/r/LibDem/comments/1di5w9a/tactical_voting_sites_may_cost_us_seats/
I can’t see any mention of stopthetories.vote in that discussion though so perhaps it’s better than the others, at the very least it appears to give the poll data so there’s some transparency there
So your evidence for this is a conspiracy theory on a lib dem subreddit? Do you have any actual evidence that this is a thing that happens because I know for a fact that the website is grassroots is not run by Labour. It’s all about holding the Tories to account not getting Labour in.
Edit: OP could not be bothered to provide an answer within 8 hours so I’m going to go ahead and say full of crap.