I know, i'd better shut the fuck up
...
... the folllowing is just my opinion - please ignore
I know this from my experiences at another forum, where the admins are "involved" at myD. I don't have experience directly with myD.
myD is a "chache" for files from real hosting sites like RS.
A user of myD is requesting a link from RS for instance (or another one of the supported hosts) and the file is downloaded to the servers of myD, stored there and then can be downloaded from there. Links directly to those cached files on the myD-servers can be posted as rapid-links.
Result: if many people are using myD, this generates less downloads from the original hoster and the links there might disappear soon due inactivity.
In some conspiracy theories people guess that files, which are stored at myD, are reported (and deleted) at the original hoster - in that case myD would take advantage of the fact that tey still have the files online.
At some forums people get banned for loading files, uploaded by someone else, to other hosts and posting the new links - and this is exactoly what this "service" is doing.
This 'service' is absolutely a disadvantage for any uploader, who want's to keep the links downloadable for everyone.
Leecher can use this service to download files from several hosts thru a paid account at this site (within their traffic-limits)
IMHO it's no favour for a sharing-community, if many user are using myD.
Links stealing destroys community -
a link-stealing service can't be in the interest of any uploader.
If someone is interested in downloading files automatically and directly from the original hosts, with or without an account at the hoster, use
http://jdownloader.org/