Oldest, i think Studio Traffic is.
Often, the highest returns are the scams. However, one of the highest returns AND has been pretty stable is
4daily.
most dependable would be
StudioTraffic,
PIN, and TGT.
Those are the ones I am most familiar with.
I hear empowerism, EZ Web Design, International Trading, and Reality Millions are all pretty stable as well. Good luck!
Some ones several people have told me that have paid are
Professional Invest Plan and
UpgainI'm accumulating money in the previous two programs, and their sites seem to be running smoothly.
Hope I helped!
-Darius