Recently one of my colleague asked to submit a manuscript to a virtual online conference. When I saw the invited speaker list I found my professor name in this list and I immediately contacted him he was stranged and knew nothing about this conference. Later on we realized it is completely a fake conference and just performed only website activities with fake address and telephone numbers and charged reasonable money from each author to present the paper on power point slides as virtual poster.
So I advice you please be careful for the submission of your abstract for such virtual conferences.