Purgatory — paying for admission
From the title it might seem there is some relationship between purgatory and getting to heaven. There is not. In fact, there is no such thing as purgatory at all. Not in biblical history and not in Bible prophecy. Just because 1.1 billion people might believe in it does not make its existence a fact. Remember that the Catholic church, the major advocate of the doctrine of purgatory, also once taught her adherents the earth was flat.
Interestingly, though, Bible prophecy does speak of a belief system that will characterize some end-times religions, and among those characteristics is the falling away from the faith. Note the definite article “the”. Instead of “the” faith that comes by hearing the word of God (Romans 10:17), untold multitudes are associated with a faith that is based upon human dogma, tradition, opinion, supposition, etc. Jesus did not ask, “When the Son of Man comes will he find faith”, but in the Greek He asked if the Son of Man would find “the” faith when He comes (Luke 18:8 marginal note and Greek).
Faith is not in short supply in our world. In fact, the entire world is eaten up with faith. You see, faith can be based upon just about anything. There is faith in education, prosperity, politics, family name — you name it! Billions of people even have faith in religion, including 1.4 billion who believe in Allah, the Moslem moon-god. In context of salvation subjectivity is not worth a plug nickel because it is based upon human thought and supposition and not upon what God has said exclusively in His word, the Bible.