o·ver·sub·scribe 
(ō′vər-səb-skrīb)
(ō′vər-səb-skrīb)tr.v. o·ver·sub·scribed, o·ver·sub·scrib·ing, o·ver·sub·scribes
To subscribe for (something) in excess of available supply: The opera season was oversubscribed.
o′ver·sub·scription (-skrĭpshən) n.