no massive secret to it. When sending a message, make sure you actually read their profile. Comment and ask questions about stuff they mention in the profile. If they reply, be funny and be the man. After a little back and forth, ask them out directly, no wishy-washy shit like, 'hey why don't we meet up sometime?'. Have a plan, some good date ideas to propose right from the start, something like 'I;m planning on doing blah blah on Saturday, night. Why don't you join?'. If she says yes, get off that site as quickly as possible and use Line or direct texting (it's been mentioned in other posts above). Set a firm time and place and the rest should be easy unless you have the social skills of a 47-year old Pokemon collector.
But each case is different. The real commonality amongst most of my successes was being funny, being fun, being the lead.
I do pretty much that, but not getting such a high 99% online reply to meeting up for the date rate. Maybe also, we are using different dating websites.
Still getting some flakes, prankish types, or last minute or that day cancels. About 1 out of every 10. 90% is good, but that 10% seems to lock on to the worse time possible or be quote annoying. That's why I double stack or plan B, especially on the weekends, where I will have 2 dates, or 1 online date in reserve, on the same day.
The double stacking counters the flakes. If the online date pulls a no show or last second cancel, it doesn't matter to me.
And I pull the women off the site before asking for dates. Which I find interesting about your style. Seems you are playing with them and asking for the date on the website. I don't use that style, because many websites have fake chat profiles or attention whore females that loving playing on the websites.
When I do that style, ask for dates on the website, I still get a certain percentage of women that won't exchange contacts. That's another point.
So for me, the litmus test is to see if she will exchange contacts or not. If not, then will cut her off right there. Then from LINE or e-mail, will ask for a date. If no or some odd time beyond 2 weeks, might also drop her contact then too.