I think I've found a slight problem with the way the AI tech-discount works. Per definition of how research-agreements work (both sides always earning the same amount of beakers) it is close to impossible to get a fair exchange when making one. I mean if we are both getting X beakers from it and their techs cost a fraction of what my techs cost it is absolutely never worth it for a player to sign a research-agreement, which means there is absolutely no benefit to keeping the research-agreement option activated.