Success last night. I did change to two different names. Also did shorter races. (3 laps at Test Course, which is sort of an odd distance because the prize doesn't go up). My R92CP beating up on my drone's Speed 12 (kindly shared to them by me). Great thing was they got the jackpot, so they built up credits too (to buy cars to share with me). I think I got up to about 6xCr150,000. And at some time I made the drone buy a Veyron and did a few races R92CP beats that. (First was close, because Veyron managed to draft, after that, not so close--I wonder if it accidentally switched back to Sports tires?).
After that, I went to 3 laps of Sarthe(old). That got up to a 3x payout, my R92CP still beating up on their Veyron. So I did a 20 lap race and got a jackpot (4x) too. But unfortunately all those were exclusive to me. But I did buy a 787B which I later discovered I could share with my drone.
Still continuing in the same session, I started a Nürburgring 600km race (30 laps) before I went to bed, as I had done the night before (Cr800,000 is reasonable income, even without jackpots). (all races were AI versus AI, btw). I woke up in the middle of the night, and it appeared the finished race did not get a Jackpot. I was at about Cr10,000,000. So I started another 600km race, and when I next woke up, I was sitting at Cr16,000,000 and the drone had got something almost as substantial, too. So he must have got about a 7x jackpot in 2nd place, I think.
In the morning I couldn't resist taking the time to share the 787B with the drone, and did a couple of R92CP beats 787B at Test Course short races, getting one jackpot. But I exited to save and do some other tidying and experimentation. (You can go to trade even if there's no other PSP around, and thereby view all your tradeable cars (mostly the best ones)--you can even put them into your favourites there).
So I might see if my drone can collect (from me) all the cars available to him without ever leaving day 1.
Seriously, any adult with reasonable disposable income, but with constraints on their time, should buy a second GTPSP setup--it's not worth spending the time to do lots and lots of money-making races when you can do other things while your drones do it for you. And the jackpots, and the fact the game day doesn't change, just reinforce the argument.