(Kosonen, here is a tip regarding any websites and knowing whether they contain "truth"...any so-called "Bible scholars" and their websites that have a "Donations" section are NOT trustworthy. They are compromised, because they have attempted to misuse the teachings of the Christ as a means of monetary gain. They do not have holy spirit backing them and they cannot be trusted as a pure source of truth. Both of those websites you posted are asking for money from people for their "work". They are not God's representatives and they are not asking for money because Christ told them to. They are being naughty and they are not reliable for accurate information on understanding Revelation or the rest of the Bible for that matter.)
Christ said: "You received free, give free" regarding sharing truth with others.