Advisable Account Limit

[VashTheStampede]

I'm aware that whatever accounts are ip linked are all insta banned. And you run the risk of getting accounts on the receiving end of trades/drops/vends banned as well.
Apparently running more than one account for more than 16 hours in a day is a flag I've seen mentioned more than once.

But what I'm wondering is if there's a maximum account per ip trigger. From what I've read it doesn't sound like there is. I can easily register each on a different ip. But I'd just assume log them in and run as many as possible at once(I'd like to do eight).

So has anyone noticed an absolute limit?