Most of so called secrets are just methods gathered or bought from real DR researchers. It's obvious that people who do not have skill, knowledge or tools will not share the information. Information (or 'secrets') means money, so they won't give it away for free, even when they got it for free.
Great example of such behaviour was 7200.11 0LBA/CC problem. When we published information for free (on yura.projektas.lt) we saw who is who in DR business, not only in Poland, but in the whole world. It was unthinkable that most of DR waited for PC3k update, already saw all this money from such easy cases and then boom - people can do it for free thanks to us. It really showed who is a DR researcher and who is just moneymaker

I will quote Dmitry Postrigan on this:
"I really do not think that we should or even can prevent the information like this to spread out. We, the data recovery industry, cannot and should not police the internet and kill information by all means. If someone's business really depends on information like this that much, then it is definitely some very flawed kind of business."
There is also other side of 'information sharing'. If some terminal commands can (and should!) be shared, it's a mistake to give any advices on physical DR. It's not because of money, it's because of customer's data! We've seen to many cases, as described above by thatdellguy, when people brought HDDs damaged so badly that they couldn't understand that it's extremely difficult to even start data recovery process. Two examples:
http://mydata.pl/nic-na-silehttp://mydata.pl/nic-na-sile-cz-2All those YT videos about changing platters, heads and encouraging people to mess with their damaged HDDs are just making people do things they will almost always regret.