The important part here is "posted 300 times". That old Zoomhash campaign required only 50 posts and paid 0.08BTC in march, when the price was almost $700. On top of that it didn't require legendary or hero status.
I hear where you're coming from, but those type of monthly or weekly sig campaigns that are fixed amount are kinda gipping it's sig holders.
The point I'm trying to make is 50 posts to make is really not alot of posts if you think about it. That's less than 2 posts a day, not much at all. Chances are if you're participating actively in a Sig campaign you can make 3 or 4 intelligent posts daily. 100 posts in my current Sig campaign 4 posts a day average at Senior level for example would yield 0.12BTC right now. Not impossible by any means.
Also, one Signature space campaigns that are pay per post with good rates also include Full Members (like 10 cap for instance) so it's not just Hero or Legendary able to get a good amount for advertising their service or website.
