Extreme Use Bytes
1 minute 39,000
1 hour 2,040,000
8 hours 16,320,000
20 8-hour days 326,400,000
1 24-hour day 48,960,000
31 24-hour days 1,517,760,000
Typical NTRIP networks in the Australia track GPS+GLO only and transfer ~18,000 bytes per minute while tracking 16 satellites.
Normal Use Bytes
1 minute 18,000
1 hour 1,080,000
8 hours 8,640,000
20 8-hour days 172,800,000
1 24-hour day 25,920,000
31 24-hour days 803,520,000
250-Mb per month is plenty of data for most survey and engineering users.