Definition of 'I bet/I'll bet'\n\n You use I bet or I'll bet in reply to a statement to show that you agree with it or that you expected it to be true, usually when you are annoyed or amused by it. [informal, spoken, feelings]

The phrase I/ I'll bet you do,  means I really believe you, so much that I'm willing to make a bet on it.  The scenario in which it's stated, however, is what actually determines the meaning.

Media commentators have justified the restrictive legislation in terms of protecting the youth from gambling problems, reducing social costs of problem gambling, breaking the ties between legal gambling and organized crime, protecting the lower socioeconomic groups from gambling, safeguarding the Russian identity, but ...

In 2009, gambling was banned almost everywhere in Russia. The only exceptions are four specific arranged zones, namely "Altai Palace" in the Altai Republic, "Sobranie" in Kaliningrad, "Casino Sochi" in Krasnaya Polyana near Sochi and "Shambala" and "Tigre de Cristal" in Artyom near Vladivostok.