If the "90" refers to a 90-day challenge, the link might be gated behind an email list. Go to the main megatut.com homepage, subscribe with your email, and look for a welcome email containing "Your 90-day roadmap."
While the domain currently returns no valid content, historical WHOIS records (sampled) suggest it was registered between 2008–2014. Common characteristics of such “mega tutorial” sites from that era include: megatut. com 90
The 90 may have been a file ID in a database that has since been wiped. If the "90" refers to a 90-day challenge,
The query megatut.com 90 is not a bug in search; it is a gravestone of a forgotten digital learning object. It highlights the fragility of web-based education and the need for persistent identifiers (e.g., ARKs or DOIs) for tutorials. Until the domain is resurrected, the meaning of “90” remains an open question in digital folklore. The 90 may have been a file ID