Another is circle to circle amplification or C2CA, where the RCA products are digested with a restriction enzyme and ligated into new circular templates using a restriction oligo, followed by a new round of RCA with a larger amount of circular templates for amplification.
The description of circle-to-circle amplification (C2CA) highlights a process where RCA products are processed with restriction enzymes, ligated into new circular templates, and then amplified again using more circular templates.