Amazing do they have a limit on how many coins/tokens there could be listed at the moment? i am pretty sure a lot of tokens would love to get listed on ONAM's exchange.
I don't this should matter. I mean if they are accepting listing and one coin has already submitted their listing request; they should keep their doors open and not limit coins now. I mean they should have a scalable solution so it shouldn't matter.
No exchange would like to keep hard limit for number of tokens listing at exchange. But depending on their infrastructure they will add tokens slowly.