iCloud grants you 5 GB of "free" storage, including music. iTunes Match just grants you free additional storage for the matched music.
If you download the iTunes Match music then cancel, iCloud will sync the music on your devices using up some of your 5 GB pool.
So as long as you don't exceed 5 GB for your non-iTunes music collection (after they have been iTunes Match upgraded to 256 kbps) you're golden.
That's how it currently works for me. Half of my music collection is on the iTunes Store, the other half is in iCloud.
iCloud grants you 5 GB of "free" storage, including music. iTunes Match just grants you free additional storage for the matched music.
If you download the iTunes Match music then cancel, iCloud will sync the music on your devices using up some of your 5 GB pool.
So as long as you don't exceed 5 GB for your non-iTunes music collection (after they have been iTunes Match upgraded to 256 kbps) you're golden.
That's how it currently works for me. Half of my music collection is on the iTunes Store, the other half is in iCloud.