I could see current higher-level projects taking advantage of their "first in line" access to the subscriptions.

I could also see people writing "wrappers," and intercepting the top-level contribution, then skimming a bit off the top, before sending them on.

Face it. There's money to be made, and a lot of really smart folks, with no ethics whatsoever, are more than willing to go for it. They'll figure out how to game it.

The bottle has been uncorked, and the genie has escaped. There's no putting the candy back in that piñata.