I don't know who the author of 'Chinese Checkers Novel' is. It could be an indie author or someone who has written it for a specific niche or local audience.
I'm not entirely sure as 'Chinese Checkers Novel' isn't a widely known common title. It could potentially be a novel that somehow incorporates the game of Chinese checkers, perhaps using the game as a metaphor for the characters' relationships or life situations.
Most plagiarism checkers can't see deleted stories. They rely on sources like the internet, which once the story is deleted from there, it's gone from their scope. However, if there were copies made and stored elsewhere before deletion and those copies are in the checker's database, there could be an issue. But usually, if a story is truly deleted, it's not going to be detected as plagiarized by a normal plagiarism checker.
There are also some online tools like SmallSEOTools' plagiarism checker. It's free and can be used for romance novels. However, it might not be as specialized as some paid ones. But it can still give you an idea if your work has been copied from elsewhere. When using it, you just need to paste your text into the tool and it will scan for similarities.
One r4r success story could be about two people who met through r4r and started a business together. They had complementary skills and by networking via r4r, they were able to turn their ideas into a profitable venture.
Well, when it comes to fanfic, R&R typically means that the author wants you to read the story and then give a review. It's a way for them to get input on their writing and know how readers are responding to it.
In general, no. Social media posts that are deleted are removed from the platform. Plagiarism checkers usually don't have access to the deleted data on the social media site. So, they can't detect content from those deleted posts.