We did a wall/profile post about launching the serialized novel but we really don't know how effective wall posts are. Since there are few, if any, replies to our wall posts either our subscriber base is dead or they're not seeing the notifications. But the core issue we think is that few of our subs are even interested in novels to begin with.
Tapas probably opened up novels expecting authors to bring readers with them like @daniolivers did. However if you have no existing readership it will be pretty hard to be found. Unfortunately there's no answer that we can think of to rectifying this because everything done for non-premium authors comes at the expense of premium series. Staff isn't going to trade away income for non-income. For example, if the daily snack remains at 5 per day, staff has to either drop a comic or a premium book to make room for a non-premium book, that frankly, probably will get very little interest. We seriously doubt that will happen. Tapas will lose income and some comic creators will rage about how they are getting short changed by novels.
Improvements to the books side will probably happen for the app like the addition of "Trending" and "Fresh". It's just going to take a while because due to having a small team it takes a while to get things coded in.