Essentially a bunch of perpetual no-hopers (apart from the Oranges, who seem rather out of place).
Good at providing token opposition though.
Not all of them. UPND has a very good chance of winning the Zambian presidential election. I would say they are favoured at this point (if no foul play) and CUP has 40% of the seats on Zanzibar (with some rigging - would have won otherwise) and a good chance next time.
I think some of them will prevail with elections generally becoming fairer in a range of countries.