I believe that God has always made a way for a person whose heart is right to correct what needed to be corrected before all would be lost:He maybe died when he committed the sins, but was able to confess, would you say?
"There hath no temptation taken you but such as is common to man: but God is faithful, who will not suffer you to be tempted above that ye are able; but will with the temptation also make a way to escape, that ye may be able to bear it." I Cor 10:13
When a person is really simply tempting God because he's done it before and God in His mercy seemingly has 'let it slide' the person will sometimes [frequently?] presume God will do it continuously... but that is a foolish presumption. There is a limit to God's mercy or patience with a person who makes presumptions about God. The children of Israel has their 10 times before God effectively said , "Enough!" Then after their 40 years they died in the wilderness instead of entering the Promised land with their children.
David's punishment would have been death but God knew the man's heart and made " a way to escape". David's way to escape was seen in his willingness to take the punishment he knew he deserved under the law given to Moses, that is death. David owned up to his fault and God sent Nathan to give him a lesser punishment.
God is no respecter of persons. [That is, God shows us no more mercy and has no more patience with us than He did with David.]
As He gave David "a way to escape" so will He do the same for us. If He has done this for us already and we go on our merry way presuming that God will repeatedly do the same thing again a limitless number of times, we have failed to understand God. He is God and He knows when we are tempting Him rather than admitting that we deserve death.
The punishments or rewards of God are measured according to these words of Jesus:
"But he that knew not, and did commit things worthy of stripes, shall be beaten with few stripes. For unto whomsoever much is given, of him shall be much required: and to whom men have committed much, of him they will ask the more." Luke 12:48
We should never presume that no matter what we do, God will be merciful because once upon a time, we repented... This is the problem I see for some people presume their own salvation [unending Life with God] is a fixed thing through their OSAS belief...
I say some because some people with this belief may not presume to play games with and to tempt God.