I think it is because they can write off their deductions all at once instead of over several years? Again, not very up and up on this one. But I found this video helpful:
The "R&D credit":
The video confused me.
It's been called both a "credit" & a "deduction", but those things are very different.
(A credit is generally worth more.)
Depreciation:
I ran into this change too, ie, my CPA is deducting some of my capital
expenditures which I'd expected to be depreciating. This doesn't do
anything to avoid paying taxes....it just time shifts the tax burden to future
years (relative to depreciation, which time shifts taxable income to earlier
years). Tax gets paid either way...it's all a matter of scheduling.
Stock compensation:
This is giving something of value, even though it's not actual cash.
And because it has value, we see this reflected in loss of value to
the stockholders by dilution of shares. It's like government deficit
spending using fiat currency, which also has the same kind of cost.
While it's a tax deduction for the company, it's taxable income to
the employee. The video explains well why Amazon does this.
Ref.....
Rewarding Employees with Company Stock | The U.S. Small Business Administration | SBA.gov