Sow good and only good with the right perspective and/or attitude (and expectation) (from a pure heart) and reap only good in return (though it may not always be or always come in the exact way (or timing) in which you always expect, etc) and, then, of course, sow evil and only evil, and then the expected return should always be very obvious, etc...
It does a lot of people absolutely no good at all to give money, when they are not just naturally natural givers in a lot of other ways, because they turn it into something that is evil when they are not, or when they don't, or when it is not, etc, and even if they do happen to get riches in the form of money and/or material wealth/possessions in return for it (their tithe) when they are not, or don't, or aren't, etc, God will actually make it a curse that comes upon them, when they don't, or they are not, etc, and they may not even be realizing it until it is just way, way "too late" for them, etc...
Without the right perspective on money and/or material wealth and possessions, it can be the root of all kinds of evil, etc, and this can be if you have little or a lot of it right now regardless, etc...
So very many people, even very many "tithers", make it into their God, etc... and this is whether they have seen a return on it currently right now or not, etc... The Bible calls this entire category "mammon", etc... Which is best described as "all kinds of any kinds of great wealth and/or riches", etc, most especially money-wise or material-wise, but that also includes "possession-wise" also, etc...
If God gives you a lot of it when you are not yet ready for it yet, He is actually cursing you, and putting a very great heavy weight and great curse upon you, etc, and this can be whether or not if you always tithe it studiously or not, etc...
Tithing it does not free you from the curse of it if your heart is not right with God and you are not yet ready for more of it yet, etc...
"Mammon", etc...
You have to view, and see, and use mammon very much wisely, and very much perfectly correctly, in order for it to not be cursing you, or be laying/bringing a very heavy curse upon you, etc...
And many people who do actually tithe, have not even begun to escape this yet, etc, because it doesn't discriminate in and/or between either group ever at all ever, etc...
Also "mammon" is not just restricted to money, and neither is the tithe, etc, just take a look at the OT, etc...
I find it very funny that many people seem to think that it only just means just only money only nowadays, etc...
But, that is today's world I guess...
After all, it makes the world go round, right...
They think that if they just give just only their 10% of just only their money only, then they're covered, etc...
Well, I hate to burst your bubble, but it means so very much more than just only that only, etc...
But if your heart is not right (with God) to ever at all begin with anyway, then it doesn't really matter anyway, as I have been trying to say, etc...
Because that's only what God was after only in the very first place anyway, etc...
God Bless!