sucicde bid

It's hard to know/predict either way. Usually it doesn't change your chances of getting a bid from that house, and I've heard that it has helped/hurt girls depending on who you talk to. I have a few friends who suicided and got their chapters, and some who didn't. It really just comes down to dumb luck/how high that house ranks you on their bid list. Let your first choice house know they're your first choice, but probably don't mention that you plan on a suicide bid.

To some extent, yes it will. So after pref, recruitment staff will look at how many girls are left and likely to accept a bid versus the number of houses and determine quota. So lets say for a hypothetical scenario quota is 100 girls per chapter. If you suicide, you must rank between 1-100 OR enough girls who ranked higher than you get put in their other pref house to bump you up to one of those spots for you to get this house. If you do not fall within quota and suicided, you are dropped.
If you don't suicide and list both houses on your mraba, it becomes a numbers game. The computer will look at how you ranked the house versus where you fall on their list. If you are ranked in one of those 1-100 spots for one house and not the other, you'll go there. If you fall below 100 for both houses and this is when quota additions happen.
So the way things are now, if you do everything you're supposed to and you maximize your options, you are guaranteed a bid somewhere. Due to girls prefing different houses, it's not as simple as every house gets 100 girls. So if you're someone who fell below the cut off for both house's lists, you'll get added to one of those house's bid lists, meaning they get 101 girls. They typically take into consideration the girls #1 choice when this happens.
The big thing to note is, NO ONE knows who the quota additions are. You know a house has them, because they got more girls than quota, but you don't know which girls were the addition because this all happens through a complicated computer formula.
So at the end of the day it's up to you, but in my opinion there's more risk to suiciding. It's better to get any bid than to be called by your Pi Chi the morning of.

It is unfortunate that some pnm's believe that suiciding will somehow help them get a bid to a certain house by demonstrating how badly they want that sorority. This is not true at all. It's your place on the houses' bid lists that determine your chances of a bid, and your rankings or suiciding don't affect in the least your placement on a bid list. In fact, the houses don't even know your rankings at all for any round. Bid matching does not consider that you ranked only one house; you either rank high enough to match before they make quota or you don't. If you have only one house at pref and you put that house on your card you will get that bid. Don't suicide; give yourself a chance at that other house and try to make it work!

Only suicide if you want to be a contender for cob, snap bids, or spring rush. But if you suicide you may not ever get into a sorority it just depends on what you want. But also keep in mind the girls in their own sorority know it better than you. You want to go to a house that wants you, not a house that thinks you won’t fit in. If you got dropped by your favorite house it may be for a reason, you will go where you belong if you trust the process.