As much as I hate Mayweather viscerally, he just asked for a little test for the integrity of the sport and to a lesser degree, for his safety. As both would be tested in an equal way, I don't see the big deal, especially as such tiny amount of blood can't drain somebody down, especially if it is done a few days before the fight. 10 millions per pound is exaggerated, I agree that they put a good amount to avoid a Marquez episode II but one or two millions looked damn enough. The olympic test request to me was just a fair demand on the other side, an elite athlete that doesn't have nothing to reproach himself would have no reason to refuse a blood draw or two within the 2 weeks of the fight.
When I was super broke, I used to test medicine to earn money... 2 week-ends, 1400 can bucks in some case. Quite a fast way to get out of brokeness. On one week end, they were taking up to 20 blood draws. NOt huge quantities, but still, 20 over the whole week-end then 20 more 2 weeks after for the other seance. Honestly, I never felt dizzy or weakened whatsoever, they were all taken by catheter except for 2. I was feeling so good that once I even went for a volleyball game after the week-end on the following monday. If an out of shape guy like me went no sweat across 20 blooddraws over a week-end, an elite athlete like Pacquiao should have no problems getting 2-3 in 2 weeks.