Which Payment Model Do You Prefer? (Membership? One-Time? Modular?)

There's one subject that I am in the process of creating an information product on. As I am putting things together, I realize that there is more that I can teach than I can reasonably fit into one product.

In other words, this is going to be more than an ebook plus some training videos. Or, if it were that, it would be an ebook of epic proportions and tons of videos.
On the one hand, I don't think anyone would bother reading and watching so much information, if it's presented all at once and on the other hand, I think a product should be focused on a very specific topic.

As an example, I think "Traffic from Social Media" and "Traffic from Search Engines" are two subjects that are closely related, but it's more fitting to make two seprate products rather than cramming in both topics into an info product about traffic generation in general.
That's not the subject of my product, by the way. Just an example.

So, for a large amount of information, what's your preferred model?

Membership Site
Pay a small monthly fee in exchange for access to a constantly growing database of information.

Big Product, Big Price
Just one big package, all the info, all the training, all the videos etc. in one big product. Of course, I'd make sure that this big product is more than worth it's price, but it would naturally cost quite a lot. On the other hand, it would be a one time fee and over time, this would be less expensive than a membership.

Modular Product
Split the information up into smaller, more focused products. You can choose to buy only one (e.g. "Traffic from twitter"), bundle several together or get them all at once. The choice is yours.
Another possibility would be to sell one of the sub-products on the front end and sell the rest as upsells, downsells, cross-sells, back-end sells etc.

Early Bird Model
Start out by releasing one small, focused product at a low price. Expand the product over time and gradually increase the price as the product grows. Everyone who got in early gets all the updates for free or for very cheap. Everyone else needs to pay the current, higher price for the entire product.


In the Poll, please vote for what you prefer AS THE CUSTOMER.

I'm aware that maybe from the perspective of the marketer, one model is more lucrative than a different one. But really, I want to find the ideal model for the customers.
That's why I'm asking about membership sites. Obviously, this can be very lucrative, but does anyone really like the membership model as a customer?

Thanks.