[osolo]

Imagine you're Expedia, and you want to make this consumer friendly change.

Now, on your website, all the hotels seem to be more expensive.

Nobody will understand the intricacies of why, and they'll simply book somewhere else where hotels are "cheaper".

We need regulation so these fees appear industry-wide.

[jankassens]

An aggregator could offer a checkbox to include fees or make users otherwise aware of that fact. Would definitely differentiate that aggregator for me!