I think a tell that many of these deals likely aren't real and are basically just PR is the numbers are super round and digestable.

That's a clear signal that little analysis has gone into the numbers and, most generously, there's nothing but the shape of a deal the details of which will be ironed out and adjusted in practice.

I get that the amounts of funding and capital being sat on for the respective parties are collossal and lead to rounding that doesn't make sense from the point of view of an individual any more (what's a few million at this scale, just round up to nearest 10, etc) but deal sizes of literally round numbers of 100s start to stretch credibility on whether any real analysis was involved.

In fact it'd be a ridiculous coincidence if it had been. They're the kind of figures where you'd recheck your calculations to check it's right as it seems too perfectly round.