I don't know anything about 'failing fast' or other startup methodologies (I'm here for the hacker part of this community, not the startup part).
Is this product designed specifically for startups? Is it intended to be removed later when you have 'found product market fit'? Isn't it more expensive to be locked in to this platform, which you don't have the source to, and can't modify if it doesn't 100% meet your needs?