Some keys always work. Some keys almost always work. For this there is a topic of non-working keys, where you can calculate everything yourself. And someone keeps some lists for the lazy. Based on this, you can decide what to do with the keys. And taking into account the frequency of keys dropping out, you can always first wait for the second, spare one, and only then boldly go for an exchange. Of course, lists and topics don't give the whole picture, but they are more than enough to avoid all kinds of misunderstandings like Time Ramesside or Zeno Clash 2.
It will even better explain why large lists are bad. Because how many of those games on the wish list do you actually want, and then how many of them do you actually want to play? So, calculate how great your chances of exchange are if you offer someone something that you yourself will never play.
For me, for example, if more than 40 games accumulate in my Steam wishlist, then I am already suffering. (And there are a dozen games with such prices that I don't even understand why I keep them there, because I will never buy them without a 90% discount.) For barter, I expanded it all the way to 100, but there the head almost cracked. Yes, it greatly reduces the chances of any trade-in offers, but I'll get exactly what I want.
The amount offered is not about greed in any way, it is about your chances.
Although it happens

A week ago, I talked with a person who was offered to choose how many games he was interested in from my list, because judging by the site, he was interested in everything at once, and I was interested in his one. He chose about 20 himself, and I offered 15 of them for 1. For a game that costs a dollar and a half on Steam discounts. He decided that this was not enough. As I said, people who spent $0.2 are moguls, they need to be understood.
First of all, you need to understand that declining is a normal practice. It's a bit of shitty, because the reasons were talked earlier, but it's normal. And it works both ways. Each profile has statistics, and the decline rate there is usually around 90%.
It is also necessary to deal with several things.
In the site settings, you can configure which offers you are ready to receive. You can exclude something, for example, games with a bad user rating, or exclude the possibility of receiving offers for games that you do not have in your wishlist. Alternatively, include the ability to receive offers for games you already own.
What you cannot exclude from proposing in these settings - add to the blacklist.
Wishlist. It's not necessarily just syncing with Steam. You can add games there directly on the site, which will expand it. This way you can keep your Steam wishlist cleaner. Well, when there are already 1000, it's probably too late, but it's possible, huh.
Counteroffers - if you are offered something, you can not only accept or refuse, but also make an offer in response. You will go through the list of games for exchange, choose the one that interests you most, and offer in return. What you can choose also depends on the settings of the site (

). I mean, if you have checked the box that you can receive games not from the wishlist, then you can choose from the entire list of games. If only the desired - then only the desired. Everything is simple.