In college I put in 20-40 hours a week during the school year and got paid $0/hr. During the summer I put in up to 70 hours a week and got paid $0/hr again. My reward was my own project, three full years of research experience, some research credits, two undergraduate symposia posters, an honors thesis, a first author publication, and what I assume is a great LOR.
I now work as a lab tech full time. So far I've gotten another 1.5 years of research experience, my own project, put as lead on several others, four posters at national and international conferences (two of which I presented), two first author publications, and what I assume are two great LORs. As a bonus, I get paid this time at a rate of $12.50/hr.
My point here is that pay is the last thing you should be concerning yourself with in research. Focus more on what you're getting out of it that's going to advance your career.