WTF with Linux foundation?! I mean seriously, are their certificates (LFCE -LFCSA) valid for 24 months and do they need renewal?! WHAT THE FUCK?! Does anyone of you know what is this shit or correct me if I'm​ wrong.

You can extend it with "Complete at least 16 hours of Continuing Education" ?

I'd suggest red hat certs. That is the only test where you actually have to do stuff which I think people put more faith in. I have that cert and it's not trivial and if you can pass it you'd definitely have to know your stuff. I can't speak to lfce tests though. Red hats are good for three years.