Of course, because that would only be natural for a "str8 boy" who's obviously working the scene stickily for the $$money$$, but for the "gay boys" working the scene can, and usually does, have many more motivating factors
As we all know, the money is certainly a huge magnet that attracts all the boys (str8 & gay) to the working scene - but for the gay boys it's also a chance to enjoy being in a society (or sub-community) with other like-minded gays where they can just be "themselves" (or invent themselves)... enjoy having sex other "males"...and possibility even hook a farang boyfriend if they're so inclined. Where a Str8 boy would have absolutely no interest whatsoever in the things I just mentioned.
If a punter only prefers hooking up with str8 boys - then yes, the odds of him being with a boy who is only interested in the $$money$$ are somewhere around 100%. Relationships (or interactions) like this are simply based on Sex-For-Pay, and to expect anything different would be extremely naïve.