Sullla
Patrician Roman Dictator
I chose a lump sum payment because you actually pay less with a lump sum than with gpt. A tech that costs 400 gold in lump sum will probably cost you 25g/turn in a per turn payment. This is because the AI civs don't trust you any more than you trust them. I prefer to pay in a lump sum as well because I'd rather deal with the payment now when I can afford it as opposed to the future when my income may be less or have changed somehow. I also don't like passing off a succession game with a per turn payment deal that could hobble the actions of the next player. That's not the case here, but I have seen other games where it is, and I like to stay in good habits. Trust me though that you pay less in lump sums than in per turn deals; I tend not to worry about AI civs breaking deals either because they are not nearly as devious as us humans and will not exploit us like that unless the attack was coming anyway.