The wager requirements are standard for the last few months, it was $2k per week but now the overall wager has to be over $3k in the last 7 days. The active chatting session and betting at the same time increase the chances of getting rain. Being eligible doesn't mean users will get rain due to increased traffic, more online users, lots of bots, etc.
Honestly these are not things that you should be aiming at to get something in return. As I have always said gamble the way you want to gamble and if you can earn something from it then it is great, if you are participating in anything because of it then it is great but at the end of the day if you are not going to be reaching those levels by playing the way you want to play and have to strain yourself financially and risk your bankroll just because you want to reach those numbers, then it would be a very wrong thing to do.
This is why I never check those type of promotions or rains or any marketing related stuff, I just get it if I deserve it, and if not I just move on.
As always said it is better to be in profit rather than chasing boosting bonuses/reload. In the last weeks, I was down a lot then realized boosting reload doesn't worth it at all. Better to be in profit instead of getting $200 reload boost by VIP Host after a 10k$ loss.