About 23 people watch these Indycar races on TV with the exception of the Indy 500.
Sorry Juan.
That is not to say there's nothing that can be learned from it. Think of a low-budget but lovingly-made film compared to the Transformers series, or the flocks of people at a tourist trap whilst the gems of the city remain undiscovered. Quality has never been exclusively synonymous with numbers.
Other than the image, I find the general level of racing in IndyCar more entertaining, regardless of its overall popularity. It doesn't have the potential levels of entertainment offered by F1, but F1 rarely delivers on that potential (and we've been lucky this year). There is endless wheel-to-wheel action in IndyCar, something we have been denied in F1 since the introduction of DRS. It takes good fortune rather than the good judgement of the FIA to ensure DRS isn't horribly overpowered, and the cars are permitted to physically race each other on the circuit.