Another progression post
What are the disadvantages of uping as you lose?
Theoretically you can't lose. The only problem that I can see is if you hit the table maximum or don't have the bankroll.
Can you handle a 1000 unit bet after having already lost 1000 units in a 10 hand losing streak? This will most assuredly happen within 10 hours. And what will you do if you lose that bet?
Over the long run, you will not increase your expected value, but you will increase your variance. You will have many small wins, but you will have a few large losses which will make erase your small wins. The table maximum is not an issue; you can always move to another table or casino with a higher limit.
This board tends to be intolerant towards progression posts, so if you wish to continue posting here, I recommend you find another subject or learn to play advantaged blackjack.