If the mixing service for these altcoins is not ready, do not indicate it on the home page.
I wouldn't say three icons is "a lot". And I don't see how else UniJoin could highlight what services will be available in future...
Ever watched a movie trailer before? The movie likely isn't ready yet, but it gets peoples' attention.
I am with DooMAD on this. I think it is quite normal from a business perspective to announce the services that will be offered in the near future. It is a way to create expectation and potentially attract customers to those services. What I'm more curious about is what JeromeTash says:
My interest is in seeing how mixing USDT, a centralized stablecoin which can be frozen in an address, is going to work.