Bustabit, Duckdice, and Primedice are just an example that it's possible for a platform to be a stand-alone, Bitwinup can possibly do that they are being managed by a reputable company and there's no other platform like them that is dedicated to Crypto trading arena.
Time is another important thing here. I always prefer a company that has been around for a while. It proves that they are not here to fade away. If you spend too much money in a short period of time, that can give you a huge boost, but not for soo long. But, if you divide the same amount and run some campaign for a long time, you will stay on focus for a longer time. I believe the people who work with them should talk to them and their marketing manager should have a good understanding about it as well.