I was browsing a thread and came across a thread which had url shorteners which direct us to another site which makes the OP money. I would highly suggest banning url shorteners or shrinkers.
Such as adf.ly? I don't know why you would bother with tht site, you wouldn't get much money at all, I've tried and I literally quit after I got 25 cents. It's stupid
In some cases it is harmless and yet beneficial as it actually does what it's used for, shortening a URL. I guess we can create our own URL shortner? It's not difficult, simply get a script online.
They should be allowed. If someone is realizing a free download of something, they might put that in there so you give back to them for the download. It might not be much, but it ads up over time.