My view is that, beyond a minimum threshold of decency, messages don't matter that much. There really seems to be no correlation between message types or content and response rates.
Why would there be. I assume most people are on here to find partners; if profile is written well enough and the couple or person meets your physical attractiveness criteria, why would a message need to be much more than an "I'm interested"?
You have to keep in mind that this is fantasy fullfillment for most, and they are looking for very particular things, even if they haven't detail those things in their profiles. Your profile is either going to lean into that or not.
Somewhat related, our experience is that the LS can be incredibly streaky. We will go weeks with pretty much nothing happening (here, at clubs, wherever) and then suddenly everyone's hormone switch is flipped to horny all at once, and things just fall in our laps.
I'm not saying it is like that for everyone. I'm sure some of the smoke shows out there float atop a sea of opportunity, but we are not a magazine cover couple exactlty.