Nope, I'm a singnet user and I can access it.
Nowadays, I seldom torrent. Direct Download is way better.
So maybe IH is capping the traffic for certain IP ranges - I'm
not too sure about this, but I don't use IH anyway. TPB and
Demonoid is where I usually look for torrents.
And no, I would disagree with you that direct downloads are
better. From my experience, DDs, especially those hosted privately,
are more likely to be packed with malware, because file hosting
ain't free, and they need to recover that cost from somewhere. I
don't wish to go on explaining how malware creators earn their
livings, but you get what I'm trying to say.
On the other hand, files distributed via torrents cost virtually
nothing for the creator since it's P2P. All he has to do is to
upload (seed) the files until there are enough seeders for the
torrent to survive on its own. This is why using torrents for file
distribution is much more popular among uploaders, and consequently
downloaders, as compared to providing DDs.