I plan to add a new limit to the amount of tech gained from research allies. Countries with less than half of the tech per turn of the country doing the teching will no longer get the maximum possible benefit from the research alliance. The realized benefit will reduce linearly based on the tpt difference with a minimum benefit of 10%. Expressed as a formula: MIN(1.0, MAX(0.10, 2 * ally_tpt / techer_tpt))

Example for a 10000 tpt techer that techs a single turn:

* Tech ally 1 with 5000 tpt would get 1000 tech points (same as today)
* Tech ally 2 with 2500 tpt would get 500 tech points
* Tech ally 3 with 3 tpt would get 100 tech points (this is the 10% minimum benefit)

So "tech leeching" will still be possible, but the benefits will be reduced. Let me know if you have feedback about this change.