No, some methods are dead, oversaturated or were posted by people to gain likes, i.e, they just shared an idea that they didn't even put in practice to see if it really works or not
I believe this to be wrong,
When you say "no" i beleive there is no such thing as no, there is always a work around with anything.
It just takes a "twist" to get around what didn't work before.
so,
My answer to the OP's question is.
Yes, every method works, it just takes trial and error, to make it work.
Out the box thinking makes you that "star" of making the method work!
Edit - People said, old google reviews can't be removed. I've just removed a 7 year old review.
People said trustpilot reviews can't be removed - i've just removed 2 today.
People said they can't make ebay uk accounts since they put new security in place - i have 3 confirmed accounts.
People said they can't rank AI content and it gets tanked, one of my sites 2 years old and just uses AI content and flourishs through updates.
People said they can't get reddit posting due to new updates - just posted 3 links today on a new account using AI content.
Just takes those extra out of the box thinking to actually make methods work!