No church I know of (i'm familiar with baptist, catholic, mormon and few others) require you to give. It's an on the honor system. You get out of it only what you give. Scripture tells us to judge not, aka don't worry if a fellow follower is paying, worry if you're paying.
Tithe typically is 1/10th, it's usually done as money in our day and age as it would be hard to pay in hay bales 1/10th of your increase to the priest/bishop/cleric (historically they used to).
FWIW, I pay a tithing and have never felt disadvantaged. In fact, I would argue that paying 1/10th of my money taught me at a very young age to begin tracking my money and being coherent about saving etc. I remember starting to pay tithing when I was younger than 10- as a kid I got my first job delivering classified papers when I was 8 (no, it wasn't "olden days", I'm only 28) and learned what it meant to pay a tithe and save money. Because I tracked my earnings for tithe, I subsequently tracked my earnings for savings etc etc. It has made me far better off financially. I remember growing up in a lower income household (2 adults, 4 kids) and combined income was roughly 40k tops. Less most years. My parents would borrow $200-$400 on occasion when they needed to make the mortgage (they always paid it back, but they always knew I had cash). Being more involved with money let me invest (and lose completely) $1000 in the stock market when I was 15. Haha. Funny times. I don't regret it at all actually, I'm more impressed that I had an extra $1k to invest at the time.
Long of the story made short, tithing (whether you're religious or not) provides the benefit that it makes you track and spend wisely. If you're a religious person, you get the added spiritual utility of giving of your wealth to those who need it and receiving a spiritual reward.