You are correct that the FUN tokens haven't really lived up to all the expectations, but based on their roadmap, some nice things are thing coming. But the biggest asset of the FUN tokens is the premium membership you get on freebitco.in. If you hold the tokens long enough, you will always get your investment back and get some profit. This can't be said for an investment with SHIB. Yeah, you can make some nice money on it short term, but that's about it.
Based on Fun Token’s roadmap some nice things were supposed to come many months ago but they have failed to materialize. There are many tokens that can earn you a passive income. The premium membership is not that attractive by comparison. Fun has dropped something like 80% against BTC since it was added to freebitco.in. You would have to be completely reckless with your investments to have that kind of impermanent loss with yield farming or any other passive income generating system.