Sega Channel (Score 1)

Sega Channel had at least 20 great games playable at all times. The games would change each month with a few of the best kept over. Beta versions, unreleased titles, etc would appear in a special section that only Sega Channel members would ever see. The download speed for a game was minimal (a minute maybe) and all play was infinite and unrestricted for a cheap monthly fee ($15 USD).

Here's an old article about the service.

P.S. It of course failed in the end even though it gave a lot for very little money.