IvyKoin has a great idea, They are offering better KYC and KYT option but IvyKoin is still unknown to the vast majority. I suggest you invest on ripple instead of Ivy. If you want to take a risk go with Ivykoin, on the other hand, if you want to play more safely prefer ripple.
Yes there presence is not that good which it should have been. They just had one small signature campaign over this forum for short terms but I dont think they made good investors base out of it. The investor is core base of everything and thats why popularity is important. Now for any project to be popular the marketing needs to be strong but in case of Ivyk they had weak hands in that one. The project is having nice idea, you can surely invest in it but there are also lot more great projects than that so choice is yours. Study and then execute your orders.