There are proactive ways to Stop any conflict or situation (war) one found himself. Boycotting Russian's own Gambling company might not be the best way to Stop the war. It will only affects the Nation's GDP, but remember other Countries will support Russian to Sustain during the war. If you boycott these companies, what of those people that have invested a lot.
Although it is a war tactics, but innocent people suffered the more.
The best ways to stop war are:
1. Set up a committee for the both sides of the war plus a neutral committee
2. Call the two parties for a dialogue
3. Settle the immediate and remote causes of the war.
With these I believe war can be called to a resolution stage.
Everything is correct, but only in theory.
The situation is quite different in practice. Now in this conflict, any third party, no matter how much it talks about its neutrality, will still be under the control of usa. In recent years, the whole of Europe "lies" under American politicians. And the conflict in Ukraine is the struggle of Russian civilization with America with its values and worldview. And the humanistic and moral values of America, as it is now clear to everyone, I hope, are not at all so good, and on the contrary, they hinder the development of the entire civilization and, from the point of view of morality and justice, are completely ugly. And they require replacement, which is what Russia and China are trying to do.
So nothing will work.