Yay Q and As! I will answer the best I can.
Why is this necessary or more convenient than something else? These are the questions to be answered to see if this is a good idea.
Well a in-game dating service would work equally well (if not better). Finding players that are interested in in-game marriage is a bit hard as it is, then you have compatibility things such as: Would you want to share gears with your spouse? Would you want your spouse to participate in WoE? Is your spouse Guilded? Is she a male or a female? Real life single or not? Teamspeak? Things like that. If there is zeny involved you have a higher chance of finding an actual player who you could choose as a spouse ingame, and maybe even make a real connection as a friend or even RL spouse. Is it easier to look around Prontera looking at every shop for your perfect gear or use a site like ragial?
What is the point in buying a bride?
Be more specific.
Higher chances of finding a ingame spouse if there is zeny involved. Financial well being also shows you know what you are doing. You find more willing participants all in the same place. Who doesn't like zeny?
Does the bride comes in different shapes and sizes?
Limited appearances, you may find her twin sister around prontera somewhere
i'm thinking about matchmaking. is it related to that? only you shop for brides? LOL
Similar yes, kinda, I recently started looking into this mail order bride thing because I have heard about "Russian Mail order brides" or whatever, and to my surprise it is actually a thing. Looking into stories and such, it seems to work decently well for many people, and of course there are the BAD stories.... But of course ANY type of relationship can go south, online dating is easier than conventional dating, just have to weed out the weirdos and your good... But yeah, with this it at least provides a bit of security knowing the person who is choosing the bride, likes what the bride wants, and is financially able and experienced in the game.