Yeah at that time Peerchecker offered $1 for 100 Clicks so it was 12$ for 1200 clicks and profit for OP was 7$ per batch.
Now the rates of peer checker are reduced and there is no way OP can offer this high rate.
I Suggest, threads not replied for a month or so, should be auto locked .
there is no option for auto lock the topic. moderator won't lock topic when they get old. the peoples should have enough sense and they should know which topic is active and which is not.
but newbies still bring dead threads often.