I wasn’t invited to my extended Family’s wedding, but they don’t want to be left out of mine.

My FH and I are getting married, well, we are actually eloping but we still want to have a reception/ party just to celebrate. It was an intimate event with close friends and family, but then it turned into all extended family members on my FH’s side being invited by MIL which is fine but that did take up 50% of the guest count limit. But then once I announced my engagement some extended family members came out of the woodwork wanting to be invited. No problem! Then, as family members start to talk, some start wondering why they haven’t received save the dates, but while my cousins got married I didn’t once hear a peep and I would have loved to be included. Do they actually want to be involved? Are people just wanting an excuse to party? Traveling far for just a reception seems odd especially when I didn’t receive any notices about any of my family members important events.