There aren’t any good reasons, only bad ones.
Many people really don’t understand that the futures ones are genuinely and verifiably funding people with real money on a real exchange and that once they’re funded, the only way those companies can make any profits themselves is if their clients trade profitably. In other words the incentive of the futures ones is for people to be successful, not to lose like the incentivization of the CFD ones.
Some people have been brought up on CFDs and wrongly imagine that trading futures instead would be a whole new learning-curve for them.
There are far more CFD prop firms around, so people see them more often. They also pay affiliates to promote them in forums, websites, review sites. Even here at Babypips there are paid promoters of unpleasant scams like AxiSelect, FundedNext, Monavis and firms who just can’t get many customers in other ways and therefore pay people by the post/thread for favourable forum comments. It’s deceptive, obviously, but it’s how they do business.
They’re unregulated anyway, so it’s comparatively easy for them to disappear, if they get into trouble, and for their owners to start up again the next day under a new name. This often happens. The CFD ones come and go. The futures ones are longstanding and respected: some have been around for about 15 years and even won government-sponsored industrial awards.
Just one quick, specific example of the dishonesty of the CFD ones: AxiSelect claims dishonestly that the brokerage that owns them is FCA-regulated. It isn‘t true, though. AxiSelect is actually owned by an offshore branch of Axi that isn’t FCA-regulated, not by their entirely separate UK company which is. They lie about that detail, just like the people who promote them here and elsewhere on the web. They get away with it because there’s no real regulator to keep them honest.