Offshore VIP stuff is mostly crap that doesn’t last long anyway. Was better years ago when sites did more direct marketing, gifts sent in the mail, etc. Sportsbook.com around the mid 2000’s was great then with their VIP effort.
I was in the Bovada Red Room for a whopping one month. Think I got one deposit bonus and that was it. Later they put me in it again, and then once again removed the status a month later. Have been using them very little since then.
As for BetOnline, I did reach some sort of VIP with them. Really was just extra emails and calls with bonus deals. No criteria was ever made clear on how it was attained, but I had my share of deposits/losses. I didn’t answer the calls or write back to the emails after a while. Wasn’t happy with how they handled some situations and I’ve used them way less frequently.
With US books these days, one pro is any VIP or higher tiers are generally well defined. It’s clear what it takes to get there, what benefits there are, how long the status will last, etc. It helps since some of the US books have ties to real land casinos who’ve had successful marketing, hosts, tier levels, etc for many years. They learn how to structure and market it right, while offshore places mostly just make stuff up as they go along.