Well worth asking.
Personally, there are several reasons. While the pricing has certainly raised compared to when I joined, they still typically tend to be cheaper than what it would cost for me to buy the same record here in the UK with shipping. The last album I bought was Emma Jean Thackray's which was $31 (approx £23) as part of my grandfathered essential, but the standard pressing averages at around £25 plus whatever postage would be (£4?).
Linked with the above, the VMP pressings tend to hold their value much more than the standard pressings, especially as an international. I typically cull my records yearly and while monetary value isn't the reason for purchase, it's always nice to be able to re-sell them for what I paid or more if they no longer appeal to me.
A big benefit in my opinion is CS. I have never had an issue with them when it comes to having replacements sent. Sure, I would prefer not to have issues in the first place but I have been in similar positions with other labels/companies and have had real problems trying to convince them of the issue, gain a refund/replacement, or even get a response.
Classics. This is really the main reason I am still with VMP. They sound fantastic and I really like the selections. I'm usually clued up on all of the jazz titles and really happy when these pop-up. I love the soul/funk/blues picks and they are areas that I am less familiar with. These are the ones that I go in blind and probably act in the way VMP was initially conceived, to educate and broaden musical tastes.
When I do complain about VMP on here it's always knowing that they will fix the problem with a replacement. I have had a bad run of warps lately but have received flat replacements for all. I have not 'quit' being a member since I started but do chuckle when I see people comment with the typical "VMP are so bad, it's crazy that people are still members" but then re-sign up when they release something that they want.