I'm not trying to be rude about this, man, but if ignoring you doesn't work, I'm going to have to try to talk you into downing a bottle of Ambien and a couple of sixpacks before sitting in your garage with the engine running (it's both easy AND effective). Also, I certainly decline. Needy people think everyone else is needy.

First off, it is perfectly possible to determine if you are blocked via text. It's just somewhat intrusive.

Second, I didn't even text one of these chicks.

And third, blocking texts actually isn't completely trivial on Android or iPhone phones. There are apps that do it, but unless a girl has had major issues with needing to block texts, she's not going to have one installed.

If you get blocked on POF, they delete all messages that were exchanged. But in all honesty, I don't post transcripts.
I know a lot of people are going to disagree here, but I think "lost interest" is a copout for "we don't really understand the situation." "Lost interest" could mean sucking some other dude's shlong, has a boyfriend, suddenly came down with measles, is depressed, on her period, thinks your a creep, is playing hard to get, is following some bad dating advice, etc.... If a girl simply isn't interested, the solution would be to be interesting, and that's simply not the solution for "lost interest." I'm not saying that I disagree with you... a lot of highly regarded theory and whatnot depends on interest levels, but I'm more interested in knowing what is going on under the hood if ya know what I'm saying.
I didn't over message, nor did I say anything completely out of line to the chicks who blocked me, so no.
I don't know if they've blocked my phone number, but I kinda doubt it TBH. I mean blocked on POF. You can tell if you've been blocked on POF if the message thread suddenly disappears.

I did happen to see one of the chicks out at a club the other night. I briefly considered saying hi, but she looks way better online than she does in person.