As has been discussed many times on HN before[0], your read of history here is just wrong: we at Sun certainly did not think that Linux would let their own read of the GPL prevent them from integrating DTrace. More generally, other faults aside, Sun was emphatically not "devious"; as I have quipped in the past, one of Sun's greatest strengths was that it was insufficiently organized to be evil.
[0] https://news.ycombinator.com/item?id=11176361