I have very recently returned two referee reports for two different Elsevier journals. Within two days, I have received two new requests from the exact same two journals (but from different editors).
Of course this might be a coincidence, but now naturally I am wondering: did these editors somehow know that I had just 'freed myself' from the previous commitments and was again available as a reviewer? Is there, for instance, a field in Elsevier's online platform that tells editors how many assignments I have at a given time?