Chances are the active russian 3-bettor was a younger player, and thus a good online reg. Thus, while he may have an active image, he is still only likely to be 3betting hands he is comfortable getting it in vs the original raiser. The tight player is probably only opening like 910s+, 66+/AJ+. He will likely also just fold everything but 1010+/AK to 3bets. The russian kid is aware of this, and thus wont be 3betting hands like AJ/KQ/AQ/99-JJ. The russian kid is also going to be aware fo the effective stacks behind, and realizes he could get 4bet jammed on wide by some1 like yourself with 25-35b