You're getting blocked because they assume that you're cyber masturbating. I've been seeing a semi retired escort for about a year, and I've been privy to some of the nonsense - repeated phone calls, 20 texts, etc. that he receives, even with his ad down. Escorts assume that you're wasting their time, like waiters expect a shitty tip from someone that falls all over them and talks to them throughout the meal. I've only had a phone conversation prior to meeting once (actually with the one I'm seeing now) before we headed out for an extended trip. I've met one escort in a bar before traveling so we could feel each other out, and paid him for an hour for his time. You would be best served by writing ONE succinct email with your desires, and then gamble, preferably with someone that is reviewed here. The BFE is a tough find when you take the BF out of the equation. Stop overthinking, and take a gamble with someone that is reviewed, and that you find attractive. The worst thing that will happen is that you get laid.