Yes, people do that, but it is most definitely stealing. If you compare it to buying something in a store, you are taking it and then just walking out; which is theft.
At the very least this would be considered conversion, as copyrighted documents (i.e. an ebook) can be subject to conversion.
All clickbank products offer 2 months guarantee regardingless if its mentioned on the sales page or not since its clickbank policy. This is done to avoid bank chargebacks since those include a fee as well. (not just return of the total money of the purchase but an extra fee besides that) However, clickbank is known to fight back serial refunders (people that buy and refund lot of products). If you have an acocunt they will close it and if not they will block your credit card or dont give you more refunds.
There is nothing wrong with that, unless you start doing it regularly. A better way is to buy through your own affiliate link, if you really want the product, and keep it.
can this happen??? lets say i buy a $39 ebook with $10 commission with my own link, so i get $10 right. and i refund the ebook and get back my $39, so i earned $10 is it
Yes that's exactly what happens. If someone buys through my affiliate link and I get $30 commission if they return it I lose that $30.
ive only refunded when they have been absolute shit. and yes if you refund after buying thru your affiliate link you will lose the commission.