The $1 tier got limited on patreon when the game went for sale here on itch, this was due to people joining for an hour at the $1 level then leaving right after they downloaded just so they could get access to the game for $1. I could of just not published the downloads to the $1 level but I felt that was unfair to those have been supporting at that level since the start of this project. Let me look into creating a secondary $1 level for those who want to support but cant afford more, This level wont have access to downloads though.
its this way on everything, you have credit card transaction fees and then patreons fees. Credit card fees is where most of it goes on the $1 because credit card companies have a minimum fee amount. But the ratio gets better on the higher levels, which is why patreon recommends $3 minimum because is meets these minimums on a % level. So you get 2.37 on a $3 patreon. Same goes for subscribestar too. Some brick and morter buisness wont allow you to use credit card for transactions under $5 because of this same thing.