I'm probably not your ideal customer, so take this with a pinch of salt, but I think you're shooting yourself in the foot by segmenting your pricing by "number of landing pages".

I would instead price by features. For example you could segment pricing by the number of blocks you can track on a page. Free users only get 3 blocks, paid users get 50 blocks, enterprise users get unlimited blocks.

You want to be able to convert users that are only going to need the tool on a small number of landing pages. I may be wrong, but I can't imagine anyone needing detailed analytics on 100+ landing pages