You are absolutely correct that once you leave the Seeking site you can be as direct as you'd like about negotiating for BCD with the POT SBs, You can even be VERY direct about services, IOW if BBBJ is important to you, you don't have to speak in code, you can be as direct as you'd like. This includes the putas and the SB's alike. I know it's tough to get used to if you've been trained by American hookers to 1) never negotiate and 2) never talk about sexual services. Just keep in mind you are NOT in the US and different rules apply.
I also took a quick look at the local talent on Seeking in the area you are going to be in and I agree it looks encouraging, especially if you are like me and you get tired quickly of a constant diet of dark chocolate. Don't get me wrong, I LIKE chocolate, but I like to mix it up too and one thing you will find about the Putas in the DR, there is most definitely a TYPE there, and several of the chicas I saw on Seeking break that stereotypical type that you are going to find at BlackBeards and the other places in the area you'll be staying.
Now for some pluses and minuses regarding sugaring in a country like the DR. First off as you mentioned, putas are plentiful and cheap, so cheap in fact that it's VERY unlikely that you will find an SB who is cheaper than a pro, most likely you are going to find the opposite to be true, the SB's are going to consider themselves BETTER than the common putas and many of them are going to have high ask (by DR standards of course) to go BCD with you. They are going to hope that you are just a dumb gringo who doesn't know any better, and of course you can't blame them for trying. lol
Another thing to keep in mind, many of these SB's are actually putas themselves and are simply the smart ones who have figured out other ways to market themselves besides working the bars. Don't be surprised to find out that "innocent young thing" you found on Seeking works the bars full time as well and is hardly fresh or innocent. lol Speaking of fresh and innocent, if you do find an SB who is not a full time or part time puta, I GUARANTEE you that she will know what kind of guy you are once you tell her where you are staying, if she is indeed NOT a puta your chances of getting her back to your room at BlackBeards are about ZERO, no non puta is going to be caught dead in a place like that because EVERYBODY is going to see here and she'll be labeled a puta forever. It's just like trying to take a tica you met in church back to the Del Rey with you, it is NOT going to happen. lol
One of the great things about sugaring in a place like the DR is the fact that you don't HAVE TO get laid, you can afford to take a lot of chances on dates that are never going to end up BCD because the moment you leave your SB you'll have a hundred different putas wanting to suck your dick for the price of a round of drinks back home. It's a great way to break up your day, work on your skills without really ever worrying whether or not she's going to fuck you. One thing that will improve your chances of landing a DR Unicorn that's been discussed here is to dangle the bait that you might start coming back, and coming back OFTEN. Most Dominicanas, just like most Nicas, Ticas and Colombianas who do this are hoping for some guy to fall in love with them and take them out of the shitty lives they have. Any chica who is going to fuck you knowing you are going home if a few days never to return is going to be a pro, unless you have mad skills as a player and you've already told us that's not the case. So if you want an "innocent" you have to let her at least thing she has the chance of landing a real novio, not just some gringo who's going to toss her a few bucks for her pussy.
Personally, I think making a bunch of sugar dates is a great way to break up your day. Once upon a time I used to spend my entires days/nights drinking at the bar and fucking a different chica every few hours for days on end. I no longer have the desire to fuck EVERY chica, I am pretty content fucking two or at the most three different chicas each day which leaves a LOT of time to fill. What better way to spend your time than with a bunch of non pros who may or may not end up fucking you? I love the uncertainty of the sugar bowl especially when I know that I can get laid five minutes after I drop off a POT SB who ends up not wanting to fuck me.