Disable troop donation incentives for new members
It's pretty annoying when the clan is open for recruitment and people keep popping in just to dump giants and build up their friend in need achivement and profile xp.
Invite only is an option to avoid this, but it doesn't work great either (missing players that have already moved on and joined another clan, or those who simply don't even bother with invite only clans)
If new members didn't get the xp, it would cut down on the hoppers and I think it would make those tracked donations more meaningful as the troops went to clans they were loyal to.