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I noticed a couple of the big players moving to 100% as well.
I think the drop in the price and no real sign that it is going to hit $2 any time soon is having an effect.

Is it better to be stingy with any upvotes so that your Steem Power stays strong ? I notice my upvoted are worth zero

Yes. For the most part, I try not to do more than 10 upvotes a day.
I know I'll be off-line for a few days, so the extra upvotes I did today will build back up while I am gone. But, there really is no good reason to sink your upvote power below 80%. Low upvotes don't help you or the person you upvote.

Where do I go to see my upvote power ?

https://steemnow.com/ shows it.
It might not be the most accurate.

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