When I married 15 yrs ago, I as others have said, received the full range of amounts, from $25 in scratch tickets (from close friends of the family -that's all they could afford and I knew that when I happily invited the three of them) to $500 from an Aunt and Uncle. AND what you give should not be dependent on the venue!
I also married 15 years ago, and just like you had the range of gifts. My in-laws all traveled 1,500 miles to get to my wedding, so I certainly wasn't expecting big gifts, too. DH and I also basically paid for our own wedding. We postponed our honeymoon for 5 mos., because we didn't have enough of a nest egg to pay for the wedding and a honeymoon at the same time.
I think perhaps values were just different, or this generation has different expectations? I don't mean to sound old, but I see this at work, too. Generation X (me), has different expectations for what is acceptable at work, and what I expect than my Millenial coworkers. I don't know whether to attribute it to the bridal magazines, the expectations they have after the substantial graduation gifts they receive (so they expect the wedding gifts to be more), or what, but the young professional couples (20s) I see getting married seem to expect more than those in their 30s and 40s.
The $300 graduation gift I mentioned to a niece in an earlier post was given in May. I have yet to receive a thank you. That was a big gift for us, and I admit that while I didn't give it to be thanked, I am a bit miffed that the check has been cashed but not acknowledged in any way. I'll be really irritated if she starts college without some sort of thank you. But perhaps that's also a generational issue.
I have friends in our HR department who tell me that our entry level hires all expect bigger salaries than are realistic, because they have huge loans and have been led to believe they can start out with a mid-level salary. I guess it's logical to assume that with the wedding, they may be expecting to not take on additional debt -- but they don't have the capital to pay for it, either. So they decide the guests should cover their costs, and are deeply disappointed if that doesn't happen. I don't think it should happen, but I keep thinking about the post from the recently married woman who rationalized that her guests should give her a gift equivalent to a nice evening out. Sorry, toots, if I'm having a nice evening out, it's not going to be where you are the Princess, it's going to be focused on me!
Weddings have become a big industry, and to keep that machine going, requires big investments from the participants. How many articles are in today's bridal books about the backyard barbeque wedding? How many young women would be embarrassed to have one? This isn't a judgement on anyone in particular, just more of a statement about society, rambling as it is.