High fees
Cannot generate multiple addresses
Cannot access privkeys
No API access
Not trustworthy for large amounts
Have to pay extra for security
Etc, etc
The interest is BS and so are the fees. But do you agree that the custom names and fre FC to FC transactions are useful?
Certainly. However, for fc-fc payments to be useful, most people need to use fc. Network effect, bootstrapping problem, etc etc.
Custom names are prone to squatting.