In Judges (6 letters/cumulative alphabetic value of 66) chapter 6 the Midianites have impoverished Israel by verse 6. That's economics. Gideon & 300 were assembled to defeat them. In Judges (66 alphabetic value & 6 letters) chapter 15 (1 + 5 = 6) Samson releases 300 foxes (beasts) with firebrands (marks) and they destroy the economy.
300 is tied to Judas (John 12:4-6...4 ÷ 6 = .666), Sennacharib (2 Kings 18:13-16), Lucifer (Isaiah 14:12 has 25 words in it in the KJV. 25 × 12 = 300), and the lake of fire (Revelation 20:15》20 × 15 = 300. There are 18 words in this verse...18 = 6 + 6 + 6).
In 2 Kings (the 8th is of the 7》Revelation 17:11) chapter 18 (6 + 6 + 6) verses 13-16 Sennacharib, OT type & picture of the beast, robs money from the temple of God. The antichrist will rob money from Christians when he locks them out of the financial system. In Isaiah 10:13-14 the Assyrian beast gathers all the wealth of the world.
The mark is not allegory or something to be overly spiritualized. There is a massive trail of evidence from OT to NT that shows that it most certainly is connected to the financial system.