You can see the live (-ish, there cached) number on how many games have got enough ratings here

json { "status": 200, "caller_id": 0, "id": 9405, "type": "event", "cached": [ 9405 ], "stats": { "signups": 5065, "authors": 6288, "unpublished": 2082, "game": 2983, "craft": 0, "tool": 0, "demo": 0, "jam": 1862, "compo": 1119, "warmup": 0, "late": 0, "release": 0, "unfinished": 2, "grade-20-plus": 855, "grade-15-20": 125, "grade-10-15": 178, "grade-5-10": 321, "grade-0-5": 1504, "timestamp": "2017-05-16T13:02:18Z" } }