Hello mate
first i have thought u might be describing about you new forum or about your niche
but you talk more about Filehost sites
well File host are clever if you have PPS plan then the downloads are counted exactly
and if you have PPD plan then your sales are counted exactly. huh!!

yes ur files gets deleted/removed by em if they get DMCA notice
i recommend you to go with RDP's. you get like 250GB HDD you can always back up your files and upload them with faster upload speeds. alternatively u can save ur uploaded files on your filehost it self by renaming and not sharing but i guess, the file host guys do check MD5 and delete the DMCA noticed files as a result renamed/back-up'd files deleted too..!!