Usually when you open an account in a bank they try to attract you with interest.
My question is how so called Islamic banks can -likewise- offer their customers, especially as riba (and interest is clearly considered as such) is haram.
My understanding of Islamic banks is that it seems to be like a co-partnership,
which may mean that one may gain wins if the business runs or get losses if it doesn't. Like it is the case with trading one may buy a product (or in case of manufacturing produce it) and sell it with a (higher) price in order to make some wins, but at the end one may either make the wins, or it ends up as a shelf warmer, or you can't establish your business well enough etc.
If this understanding is correct usually a win or profit is uncertain.
In other words my question is what is the profit for the customer when opening an account in an Islamic bank (or does one have a profit)?
(In this article -only in Arabic- explain how Islamic banks get and use the money a Sudanese author actually say that the Faisal Islamic Bank بنك فيصل الإسلامي is only avoiding -seemingly the term- riba by trickery and basically attacking all Islamic banking systems)