Hi rejsi, welcome to our forums
I'll try to answer your questions.
1- Fortunatly, we haven't suffered any data loss in quite a lot of time. What games are you talking about, could you tell us some titles? All the games available at the main site or forums can be found by using the yellow search box in our main site.
2- The 10 years old rule especifically refers to PC games. PC games older than that or considered abandonware can be shared at the forums. The rest are considered warez and forbidden to be distributed in any way in our site. Let us know what titles and what system are we talking about to see whether they are allowed or not.
3- The best way to contrinute to our site is by uploading the files you want to share to your favourite File Hosting Service, and by posting the download files here at the forums in the relevant subforum under the "Upload Services" forum. Any thread created here will be searchable using the search box referred earlier.
Any other question you may have, feel free to ask