Without trying to compete for a reward I just want to comment with some of my own thoughts on this. I'll be the first to say I do not have the experience or time in here to come across like I have some vast knowledge to share but I do have the common sense and respect for the common goal that the people participating are working towards. As far as a criticism goes, I would say as raj mentioned above I would prefer you not use the term :unknown project" although it may be a honest term on your behalf it can be taken by "some" as a negative. I think I get what you are saying because I have paid attention to your actions throughout which is to adjust as you go till you find the methods that create the results you are working for. When you basically deployed the "delegated" and other 777 members to start this you made it a point to tell us to promote ourselves, our talents and our projects. I have seen this in the Twitter campaign and projects are being developed and brought about it seems to me in a high number. I would think this is a positive for everyone. The #steem tag itself refers outsiders to our projects, talents and community quality as a whole. We have people participating that have full lives and jobs and still are committed to this initiative because they want to see the value of steem itself and growth in the steem platform overall. That is what I thought was the point to this whole thing. 
I truly respect the fact that you look for negative feedback in order to improve upon this initiative. There are going to be people that do not see your method as the "right" way, and you are not going to be able to make everyone happy as I am sure you know already. 
I see nothing wrong with the push-up challenge in the aspect that it keeps people involved and held accountable to participating daily in something that has positive results in many forms by doing so. You left it open to creativity which can be done with a variety of methods with different physical exercise methods being acceptable, to comedy or whatever a person can creatively contribute to keep things interesting, while also keeping with the #7 theme. 
If there are ideas to improve upon your method, those should be stated by those that are critical and not just comments without some kind of contribution for improvement purposes. 
I see constructive things being offered here to draw from and people that are very knowledgeable in advertising methods offering assistance that are doing so with a great attitude. I applaud that. 
I find it hard to be critical because the effort being put forward is immense and the goal is very worthy. We are trying to cover a lot of ground in our twitter post with the push-ups and sharing of content/dapps/projects and so forth. It may be unrealistic to think each and every thing posted is going to be what everyone feels to be an ideal marketing approach. We are trying to attract people of all walks of life  to our decentralized platform. As I recall, if not mistaken you said you would reach out to the angel investors yourself and we were to focus on our own projects and talents to promote. As far as I know this is what has went on.  We've even promoted each other and other fellow steemians. 
For the first so to speak, "trial run" I think it has went quite well. Everything has rough edges when being created. I wouldn't scrap what has been built, I would just improve upon it because there is a momentum and a desire existing with those participating. IMO this is not an "unknown" project it is a steem community project with a theme built around the #7,  brand it and push it because people believe in it and are giving their heart to it... delegation or not... it's a benefit to us all. Delegation is a tool and an incentive and it benefits the ecosystem if it is flowing back into the community, which I believe it is. 
Thank-you for all you do and to all those contributing in their own way.  I leave this comment with the greatest respect intended.