The following is a translation for those of us who understand English but don't understand Russian.
Premium account offers the following benefits:
~Two times the drop for most puzzles (except for tournaments and puzzles which have few ratings, tripling always works for them). ~Lack of advertising (the only ad unit that can sometimes be displayed is in the congratulatory window that appears after solving the puzzles. Also, the ad will remain on the "Get a prize" page). ~Quick activation of lottery tickets without the need for waiting. ~The balance is replenished daily up to 200 coins if the coins become less than this value.(Once a day, if the amount of coins you have is less than 200, you receive enough coins to raise that amount up to 200.) ~Additional benefits may appear in the future.
You can get premium for a different number of days for bonus coins, as well as a prize in achievements, tournaments and various promotions.