any matrix is a multilevel scheme ...
i think that anyone can find that with a simple google search. there are many site like this, maybe there are people who want to enter. me for exemple i joined a lot of sites like this. you win with some, you loose with others. all in one i´m on winning till now, so i can´t say it´s bad.
regarding the levels it´s easy if you played another like this. Explanaition:
if you make a donation of 0.02 you have the roght to receive 2 donations of the same amout. so from the first 2 donations you are wining.
the other levels are if you upgrade, meaning that you have to make another donation to have the right to receive more donations as well.
the system gives you directly the wallet address of the person above you so you send the btc directly to him, not to the site itself.
there is spillover, meaning if someone enters from the first position above will occupy the fist free spot, leaving no free places.
a classic matrix.
enjoy!

p.s.: there are people that are joining ... not everybody is a noob

Yes this forum is definitely a good place to find out which is a scam and not.  If someone offers something to you and you find out nothing about them here in the forum, that's probably just one of the scam attempt. so make sure they are here in the forum and had posted an ANN thread.

You see them everyday with new accounts in the forum offering investments that are too good to be true. Its not just investments actually, some are selling something else like digital products and so on. If they mentione about sending your BTC first, thats something to be alarmed.