my follow-up sequence has been running eight months and i still don't know if a lead is dead or just slow

bought a list of 214 absentee owners in pinal county back in february, ran them through a seven-touch sms and email sequence over about twelve weeks, got maybe nine conversations, two that went somewhere, zero closed. the system did what i built it to do. texts went out, emails went out, replies got tagged. but i genuinely cannot tell whether the other 205 people are done or whether i just stopped too early. i set "no response after touch 7 = dead" as a rule when i built it, because i had to pick something, and i picked that. now i have a follow-up folder with 190-something contacts sitting in a dead status and i keep second-guessing it. some of those people probably get mail from six other investors. some of them are not selling this year but might be selling in two years. i don't know how to tell the system to treat those differently when there's no signal from the lead at all. has anyone built something that doesn't just mark a lead dead after silence, but actually puts them somewhere in between so you can come back without starting the whole sequence over from touch one?