I do not know about hosts, but the reason I did not try storing more data are big contract fees (it wanted 1600 SC just to make a contract) and uncertainty about what happens after contract expires, 3 months really are not much. I actually do not have that much data (or rather, bandwidth for much data), but it would be nice to store encrypted backups in a decentralized way. Although one host-one guest is hardly decentralized now, is it?