conceptually I think this is interesting, in terms of complying with bizop income claims/etc. I *believe* this is how many money 'gurus' have gotten around these regulations for years, they've used their own mugs, and own financial successes so at least it's not a fake testimonial, and then in the legalese/disclaimers noted that their success (which is valid/real) isn't representative of all and some may make nothing, etc.
Still I'd go a bit further than a blog- to something that would make more sense to have a watermarked video on it (blog wouldn't). Otherwise that'll be all over the place. Still as mentioned above you need to really think this through especially if you're making income claims (assuming they are truthful), I believe in keeping a much lower profile personally.