The motive is what counts. Only those who love God for no reason whatsoever and expect nothing from Him, are the one who love Him truly. I have ten fingers on my hand too many to count those.
You are in for a big surprise. God wrote the names of His family for the next heaven and earth from the foundation of this world --- and every one of us loves Him surpassingly above all else, including our neighbors - and ourselves. (Rev 20)
And the second [is] like unto it, Thou shalt love thy neighbour as thyself.
On these two commandments hang all the law and the prophets. Matt 22:37-40
And that must be true becauseyou say so? Your comment does not show a motive. It simply states that some were "booked" before they weren't even around. If it is true that some "love" God because they were "booked" before foundations of the world, then it's no love.
You call reality cynicism. Yet, you can't offer anything tangible to show that people would still praise God if there were nothing in for them. There is not a single church in this world that doesn't offer something. There is not a single church in the world that exists only to praise God and not in which the people expect nothing in return.