Your points make sense, but the bolded is untrue. Matches are sorted by newest message, so as soon as you respond, you get bumped to the top. This is true for Android at least, but I'm not sure why it would be different for iOS. Also not sure if that would even change anything, considering what you also said about even that not covering all the bases.
SO THEN, with the few matches who have stopped responding: is all hope lost on them? Or do you think it's still possible to try and get their number? I was thinking of maybe waiting a day and saying something along the lines of "Hey, noticed you haven't responded, but I think we seemed to be getting along pretty well, and you seem really interesting! So I figure I might as well go for broke here; do you want to grab a coffee or something sometime this week?" Or do you think it's probably unsalvageable by now? Should I possibly just shoot for their number at this point?
my advice may not be the best depending on how you deal with rejection but always try to shoot your shot. sometimes you'll make it, sometimes you won't. if not, you just move on from it. un-match them and try again. not everybody is on there to find a relationship, some may only want something small and they found that so they're not responding, or they get tired of Tinder suddenly and stop responding. Or they just haven't had time to use it. you won't ever know until you try. what's the worse that could happen really? a girl you never met thinks you sent one too many messages and says no, oh well. there's always another match waiting out there for you.