Hey! I made csgopolygon roulette bot about one and a half month ago and it is working pretty well..
Till now it worked only for those who found it at scripting page, after few suggestions I can post it here.

My tactic is already known at roulette games.
Place your prefered starting bet on for example 1 on RED, if lose place 1*2=2 on RED, if lose again 2*2=4 till you win and your profit always be starting bet size . Thats why my starting bet is only 25 or 50 with 100 000 coins. Pretty slot proces but I can make 24000-48000 coins in one day. Slow process, but I think best one because you cant predict colors, it is random..
You can try my tactic manualy and if you like it, you can try my betting bot
https://greasyfork.org/en/scripts/18601-csgopolygon-bot/

If you don't know how to install here is little tips for each browser what extension you need
https://greasyfork.org/en/help/installing-user-scripts