Belittling competitors is not a good competitive strategy, the community is smart and won't be fooled by it (https://news.ycombinator.com/item?id=32626873). If you want to promote something under my post, that's fine, people will make their choices. But if you're going to unjustly discredit JSON For You by ignoring the facts, I find that unwelcome and offensive. I suggest we compete by improving our products, rather than by smearing each other or engaging in price wars :)
I'm never against competition, but cloning a project is not something comparable. You’ve basically cloned an open-source project and are now trying to make money off of it. I took a look at your Terms and Privacy Policy, and you copied them word for word? That’s really disappointing. You haven’t added any substantial features to the project beyond duplicating it, and there are plenty of others doing the same what you've done. I’m honestly shocked that you’d have the audacity to post it here.
This guy posted in some forum accusing you of attacking him. But Chinese coders roasted him so well, he deleted his original post. You might need some translation, but it's satisfying!