A graph of the number of people described in the Russian Wikipedia by dates of birth and the number of Twitter account holders among them.

The graph shows that there are articles about 870 people (maroon line) born in 1950 in the Russian Wikipedia. Of these, 2 people (green line) have a twitter account (ordinates on the right).
The schedule could start in 1922, but there are gaps in some years. Therefore, the countdown dates back to 1950 when a continuous line of the number of users appeared.
Only about 500 articles about people who have Twitter. Of these, just over 100 people twitter in Russian. Most Twitter users are American actors, actresses and musicians, less often athletes. Beginning in the 90s, young North American actors and actresses mainly use Twitter.
Users of Russian-speaking twitter begin to be born from about the 60s. President Medvedev was born in 1965. The bulk of Russian-speaking users begins around 75. These are mainly people from show business and writers, journalists and government officials, there are no sportsmen.
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Since the beginning of the 20th century, the number of articles about people has been kept around 800 articles, since the 65s an increase in the number of articles has been seen. I believe growth due to the fact that our contemporaries are people.