I support what cabron has said, this days, alot of things are changing really fast, it's not just in the tech industry or market, but some casinos are also changing rules and updating their terms of service sometimes without even letting their customers know, running a review site will require you not just depend on what people say about a casino, but it will require you to use a casino yourself, have your own experience with the casino, this will help you write better and honest reviews.
And I did also say that, most online gambling casino reviewers started just as you, made good promises about not ever collecting money from any casino to write a good review for the casino when in reality, such casino doesn't deserve a good review, but after starting, the first casino approaches the review site owner with thousands of dollars, money the review site owner may possibly have never seen or touched in his life, and then, they accept the offer and deviate from their promise, this is why I personally never trust new review site owners coming to make such promises as you just made, human beings can't be trusted, they are very frigile and can bend at any slight opportunity.
Now, talking about casinos where or that are VPN friendly, you have to specify the type of VPN, is it free or paid VPN? For both are not the same.