That's kind of tricky because it's different across different servers, right? In an individual game, it's way too easy for someone not teching to snag a tech ally and get free tech in exchange for nothing. That obviously is a problem and what the suggestion is aimed at fixing. In a team/alliance/ffa game though, I could see giving someone a leech being part of a clan strategy. But, if they lost that ability, would it be a major loss? I'm a solo player so I can't say but I think the change would be a net plus for the game.