Nice idea to garner trust.
One discrepancy I noticed is that the title says 0.01 upfront + 0.0004 per post , while the payment tiers are 0.01 upfront + 0.0005 per post for Hero Members or 0.0065 upfront + 0.0004 per post to Senior Members.
Since you want to highlight the maximum earnable , change the title to 0.01 BTC upfront + 0.0005 BTC per post.
Secondly , the title is mostly right that it pays the highest , but only to people with lower posts / month.
My comparison is done against the RitzGrandCasino that pays 0.0006 to all Full members , Senior members and Hero members.
For a full member :
Under 7 posts per month = Gamblex pays better ( 0.0025 base + 6 posts * 0.0002 per post = 0.00375 for 6 posts Vs 0.0006 per post * 6 posts= 0.0036 for 6 posts )
7 or more posts per month = Ritz pays better ( 0.0025 base + 7 posts * 0.0002 per post = 0.00395 for 7 posts Vs 0.0006 per post * 6 posts= 0.0042 for 7 posts )
For a senior member :
Under 33 posts per month = Gamblex pays better ( 0.0065 base + 32 posts * 0.0004 per post = 0.0193 for 32 posts Vs 0.0006 per post * 32 posts= 0.0192 for 32 posts )
33 or more posts per month = Ritz pays better ( 0.0065 base + 33 posts * 0.0004 per post = 0.0197 for 33 posts Vs 0.0006 per post * 33 posts= 0.0198 for 33 posts )
For a hero member :
Under 100 posts per month = Gamblex pays better ( 0.01 base + 99 posts * 0.0005 per post = 0.0595 for 99 posts Vs 0.0006 per post * 99 posts= 0.0594 for 99 posts )
100 posts exactly = Both pay equally ( 0.01 base + 100 posts * 0.0005 per post = 0.06 for 100 posts Vs 0.0006 per post * 100 posts= 0.06 for 100 posts )
Over 100 posts per month = Ritz pays better ( 0.01 base + 101 posts * 0.0005 per post = 0.0605 for 101 posts Vs 0.0006 per post * 101 posts= 0.0606 for 101 posts )
So overall ,
For a full member , Ritz is in all cases more profitable as a negligible amount of forumers post under 7 posts per month.
For a senior member , in majority of cases , Ritz still pays better as most forumers post more than a post per day.
For a hero member , the scales are balanced. This varies from member to member , but still not many hero members participate in signature campaigns.
For now , I will stick with Ritz , but best of luck with your campaign
Jambola2