Anyone running a multitude of portal/doorway sites?

[Evil Chris]

When I say portal/doorway, I mean the domain is one page that leads to an upsell, paysite.
I have several. Some do better than others obviously.

I'm looking to boost exposure to a handful of them. Would it be wise to buy traffic for these? So far, I just feed them my own traffic from various places.

[pornguy]

No just trade a few links.