get better ideas skrub

Naw, but it depends on a lot of factors. Timing, formatting, level of writing... A lot can go wrong.

If you host a fandom RP for example, you'll find more luck hosting an RP of that kind right after a release of some kind relating to that fandom. The flipside is that the players will be more thrifty, and you might have trouble retaining interest. Timing can also have to do with timezones. If I were to host a YGO RP, I might have luck bumping my thread when it's rather late for me, as I know most people interested in YGO on this site tend to be from America.

How your ideas are formatted plays a role in the sense that, when it looks nice, it'll get more eyes drawn to it.

Writing level is all about knowing your audience. If you post 18 paragraphs of loredump in free, or 2 sentences in advanced, it's pretty much setting you up to get no bites.

Now, since your issue is 'players not biting first but they do later' I'm going to assume it's a matter of timing, rather than the other two. In that case, honestly, not much way to deal with it other than to bump every once in a while. Patience is a virtue, and not everyone will get flooded straight away.

Also, in case of a group RP, if you have a friend that helps you co-GM, talking to them and panicking together is a lot more fun than anxiety slowly biting into you alone.