>If it is bound to the same logic, how can I as a non-PUTM get the messages for the forums each day, when I come to the site.

.. in reference to search and building a local archive. I was not making reference to what you get as basic members.

>If I can get the messages via the Web Interface, shouldn't I be able to get the messages via the WebServices?

No, this is not the same thing. See upper point.

>Why not add a method that only allows to get the messages for Today, or for the Last Week, or Last month like the web interface? That way no one will be able to go back to the archive of messages, and replicate the search function that is for PUTM.

Saving all that locally constitutes a local archive. Who will control that you would accumulate all that data months after months? Do you think it'd fair for paying members to expose that method in such way? What is offered on the Universal Thread is an enormous amount of content for all members. However, regular members are encouraged to upgrade as they'll really enhance their productivity online and this is exactly what you're looking for here. This site doesn't run on charity. It is normal some options are bound to paying members only. However, we consider that we are quite generous to offer what is offered are general content presently. From what we've told over the years, we offer really too much and some of that should be move to PUTM. But, that is how it is presently. In overall, for what you need, and/or as a regular members, you should really consider upgrading. That will resolve it once and for all for your needs and you'll discover much more benefits as time goes by.