I was ES for a time a year ago. Generally, we were told to be mindful of bet servers going on and to try hosting after they cool down, if we can. The management is the same so I imagine thats still a sentiment among ES members.

On the other hand, people will join whatever they think looks more fun. If people join an es server after its globaled, it means it was the perfect time to host, whether they leave a bet server or not. A hosters job is to get people have have more fun regardless of other servers.