I used a larger tea ball and it clogged quickly. I use pellet hops with a side pickup...even after whirl-pooling i still pulled too much hop matter into the ball and it cut my flow rate significantly. Ended up popping it off. Now, granted I am using a pump, but its nothing like a a 420gph march, it only pumps 108gph, so there's no extreme suction going on in the kettle.
I think that $8.50 may be better spent building a hop spider. They also double as a filter when draining from the mash tun