ToME: the Tales of Maj'Eyal

When fighting rare or unique enemies, who have access to Temporal Wardens' talent "Arrow Stitching", your character will "feel a surge of power..." and eventually be awarded experience for the created clones' disappearance (when they return to their own timelines). While I don't know, if it really does award your character with experience, I did see the message about "feeling a surge of power..." and thought I'd tell.

lol chronomancy code

I don't think they give EXP

I can confirm that they really do not award the player character any experience! That makes this no more than a minor cosmetic issue.