I’m not sure you get my point. It’s about funding costs. Let me...

I’m not sure you get my point. It’s about funding costs. Let me explain. Say if a CFD provider were to let you on for size, 1M shares at 25%. They might do this but maybe not. Those levels they give are just a guide and would be the max subject to their overall exposure.
So you are long 1m shares at $1. That’s $1m worth of exposure and you have to put up a minimum $750k. Of course you’d have to put up more otherwise you’ll get hit with margin calls all the time so let’s assume a 10c per share buffer, that’s $850k and a $150k loan. Now CFD companies charge about 3%pa on longs on your whole position size, that’s $30k pa. That’s 20% on your $150k leverage. No rational person would pay that for leverage.