Is this real? Learning JLPT N5 – N1 here?

https://ko-fi.com/s/cba6ea57ae?utm_source=ig&utm_medium=social&utm_content=link_in_bio&fbclid=PAb21jcAOefMdleHRuA2FlbQIxMQBzcnRjBmFwcF9pZA81NjcwNjczNDMzNTI0MjcAAaflrLhFpGLTDL4DWnhkceIHNk551ZYko55MDWl8RKhXNHTzX_LifMrfsrb9MA_aem_TYicLtRSLu-FqlKr8UGNyg

I saw this on Instagram claiming that for just $15, we can master Japanese from JLPT N5 to N1 levels. Has anyone purchased it? If so, is it worth buying? The Instagram page has a great vibe, but I want to verify if these claims are legitimate.
Thanks in advance!