i do use them quite a bit.. especially to test them out.. but lately i've started buying what i can aswell. i've probably made a few quid from them aswell.. but some of them are so ridiculasly priced that it dont bother me.
i do support the companies that i think give good value for money though.. eg: audiorealism. i've bought both their bassline synths and will keep supporting them as, for the price, their product is amazing.