You can visit Russia using your Fan ID as many times as you like between now and 31st December 2018.
There is currently no restriction on how long you can stay in Russia during each visit! For example, if you were to enter Russia on 13 August 2018, you could stay until 31st December 2018 if you wished.
However, it is extremely important that you register in each Russian city where you are planning to stay for more than seven days. Registration is done in exactly the same way as registration of a regular Russian visa. More information on how to register can be found in our online registration guide.