What do you think

He is trying to get attention and to be in your head. This is why blocking and letting people know it’s over are important. Tell everyone you are done with him and never want to hear about him again.

Don’t give him headspace. Be that wondering why speculation or any reaction. Even the laughing at him is a reaction. Mentally think about you not him. Start kicking him out of the corners of your mind.

He will not change - that is the biggest lie he tells you. He'll have multiple reasons lined up for why he's signed up to dating sites and all of them will be lies.

@Frannibananni is right, the reality is that they are his back up plan just in case you don't fall back in line. He needs someone around to absorb his abusive behaviour - if it isn't you, it'll be someone else.

Be amused by it - let it reinforce all the good feelings you have about leaving. Use it to remind you that he's fine, especially when the part of you he trained so well starts to worry about him.

Congratulations for getting out!

Emotional abuse escalates the more you accept, each new manipulation seems small until you realise that all of them added together mean you can’t do anything without feeling guilt all the time. Guilty over nothing. He won’t change. Do not go back to him. A dating profile means he is happy to replace you but he probably thinks manipulating you back is easier. Then he doesn’t have to do the small creep of emotional abuse. ( because it never starts out big always small and creeps up)

Ignore him, let him get on with his own life, you get on with yours. Don't give it any more headspace.