The compromising church AD313 – AD538: The church in Pergamos is a prophetic picture of the church from approx. AD313 to AD538. The Christians faced temptations from both outside and inside the Church.
The Nicolaitans advocated compromise with paganism in order to avoid persecition.
Like Balaam, who apostatised and enticed the Israelites to sin against God on their way to the promised land, the people of Pergamos found it more convenient and even rewarding to compromise their faith. They fed on things offered to idols and were sexually immoral.
Source reference: SDA 1Q19 Quarterly