There is going to be no bonus in the public sale. But there was a round of presale (I don't have any details of that) and there is currently running private presale 2 (25% discount, 100k$ minimum investment) and presale 3 (15% discount, 25k$ minimum investment).
What they do is they buy into the early rounds with a lot of money and then resell to other people while keeping a part of the bonus.
After multiple resellers the offer I saw was 5% bonus in the aforementioned telegram channel. It's still a bonus on what the public sale will be.
What I wanna do is of course get into contact with the first resellers in order to be able to purchase at the highest possible bonus amount. But the managers of that telegram channel obviously don't want to give away from whom they are buying.
All info I got from them was they purchase the tokens for constellationlabs.io from a "company". But they don't only have that contact - their different offers come from differen contacts they have.
So there's obviously an industry behind this "buy in private presale and then resell"-stuff.
Hoping someone has some more info.