my background is striking and i was thinking of entering a amateur comp. but with no headshots its unlikely to win by knockout or tko, so to win you'd have to slog it out until the end of the match and hope to win by decision. Fighters must know this (if it is the case) and so just go to ground in order to work for the submission so they can win straight out. henceforth turning it into a jj comp. i know you can GnP a bit but to the body isn't going to win you the fight and will make you easier to submit.
happy to be proven wrong just want as much info as possible.