I haven't looked into the return for other tokens. I think that a project like brofi makes a lot of sense if you have tokens and you know that you won't be active it a community and therefore won't be able to curate with this token.
With the concept they propose, the more delegation they recieve, the less each delegator will recieve. In the long term everybody involved is losing once a threshold is crossed where the value of the distributed BRO tokens equals the possible returns in the token in question.
!ENGAGE 20
It is a good analysis you are making. It would be interesting to understand about all the tokens.
Knowing the threshold would be very good info