Just keep in mind that you need to have targeted audience, just like in any other business. For this reason, i would suggest you choose any of
the related options; forum auction ads, signature campaign, or any of the advertising services that are targeting bitcoin audience.
cheers
I'd be curious to know about the profitability of forum ads (the ones that are auctioned off). I've always wondered.
Each business will be different but its impossible to tell how profitable any sort of advertisement is, but what it does do is get your name out there which you should concentrate more on rather than just trying to turn a profit in the first month which likely isn't going to happen. I think signature campaigns can be cheaper and give you much more exposure, though.