Let me start by stating that I'm not directing this towards WaterPig Master[
in particular, but rather more generally towards the trend with lists of "sample giving companies" circulating the net and more than a few persons really abusing it to fill boxes with stuff they'll never get to use - just because it's possible (if you cheat a little) and for bragging rights.
Some people are methodically asking for samples on a weekly, if not daily, basis - some just to stockpile, others to sell on eBay and such places.
Calling you local representative, honestly telling them that you're a hobbyist with this or that project and showing a (genuine) interest in the product, should yield a fair amount of samples, without any kind of abuse.
During my youth (before the www was even a dirty dream), I called numerous companies, when funding was low and I got, not only components for free, but lots of help from their engineers as well, simply because they weren't used to someone outside the industry taking interest in their products (I heard that a lot) and perhaps it was a welcome break in their daily routines.
But then again the next time he gets a micro he'll probably buy one he has experience with such as PIC.
This argument is valid IF the sampler is either planning a major production, or is going to a job where he is gonna have a large say in whether this or that product is used, otherwise it really ain't.
And why would he change behavior?
Next time he gets a micro, he'll probably get it as a sample and sampling 10 or 100 isn't really made up by buying a single
Plus he just advertised for them.
No, he advertised for getting goods for free from them - and that leaves them as easy to exploit, rather than as a company making top notch microcontrollers (and other stuff).
When I mentions them, it's as a very satisfied customer*, which puts them in a far better light than just someone to exploit.
*Customer, as in buying stuff...
From Microchip, over the years:
Total amount of chips sampled: 6 pcs.
Total amount of chips bought: Thousands.
But anyways, I'm a big fan of the Atmega series of microcontrollers. I use an Arduino to prototype and tests concepts, and then use the basic Atmega chip for the final product.
Whatever floats you 'bo(a)t