Hmmm... this question is actually relative to your willingness to hang in for the longhaul and adapt.
In short, I think as long as T$mblr is open to new accounts,
it will always be a viable opportunity for traffic. So on a scale from 1-10, it's all contingent on your ability to make it a '10' (or at least a '7'...) for yourself.
However, no one can deny it has become more and more difficult. In fact, a royal pain in the a$$. It's not the first time though and i'm certain most likely wont be the last.
With that being said, I too finally recently got hit
again (too many blogs to mention without going postal...

cguru: )
Still, it won't cause me to throw in the towel and that's for sure.
Advice:
DON'T rely on
any social platform so much till if you lose accounts your money sites dry-up. Build your 'brand' and make your money sites sites ppl actually want to return to.
What I have learned most importantly over the past 2+ years in monetizing T$mblr is how to adapt. This is priceless and come's only with time, experience and testing.
My advice is you REALLY need to test new angles. It's obvious they see the proxies.(and have for sometime...) either think major volume or figure new ways to slip by the whole proxy/IP/cookie thing.
It's also obvious they have agents on this forum and other forums snooping around asking questions (bastards

...)
Doesn't matter to me a-holes, as I will keep
$$$Cha-ching'n$$$ off yu'r a$$e$ until I decide to move on altogether.

In the end, THERE IS NO F'N END unless you give in.
Don't give up, let the suckers who continuously complain about how
"there's no money to be made on T$mblr anymore" do that for us.
Like i've said before, i remember when i first started 2+ years ago with T$mblr and there were clowns here in threads talking about how
"dry it was" and a
"dead method" even back then.(LOL ...fools)
This was even lonnng before Reinstacker's threads. (Whats' up R?
)
Stay with it bro!
If you choose to walk away, walk away then and move on to other things... but
DON'T give up. Rather learn and adapt, why? because it's pretty much the same thing in all other IM methods (and Life in general...)
Cheers!