In google? That's surprising to hear. I was under the impression it was on a blacklist at google since I've never seen PDF.to rank. https://support.google.com/webmasters/thread/82597748/my-sit..., it was also in the "bing jail" for what ever reason, but that was fixed https://news.ycombinator.com/item?id=35677086

I don't do any SEO/Ads, although one of the noteable links came from paying a outreach company to reach out to reporters and one wrote an article https://www.lifehacker.jp/article/lht_pdf-to/, although that was many iterations ago. Just been focusing on improving the functions and design since that initial launch phase back in 2019