My english is not so good as I want but this topic I can read and understand.
It's a pity, there are not so much receivers in a big part of Russia.
Waiting for english readers and their comments impatiently.
The data varies by location and amount of traffic received from aircraft.
In a very busy area with good range, the upload maybe 30MB per 24 hours.
Netlimiter is a useful, free utility to measure the actual data volume.
There is also very similar system for sea-going vessels, called AIS (automatic identification system), and very similarly operating websites to monitor traffic, such as marinetraffic.com.
On the shore, on vessels and on satellites. If you hover over some of the more remote vessels, you'll see "Position received via satellite".