You can see the amount your upvote is worth here: https://steemnow.com/@blaze312 ; for now, it worth less than 0.01, but that doesn't mean 0! The strenght of your upvote depends on 6 factors:

-the amount of Steem Power (SP) you have : in your case 0.905 SP

-delegated SP : 14.149 SP; in your case this is the "welcome gift" when you come from steemit, but anyone can delegate his steempower to another user, usually in exchange for a fee. Together delegated+owned SP give you a total 15 SP.

-the price of steem : on the page I linked, on the top right corner you see a number showing you the value that is currently accepted as the reference point for the value of 1 STEEM. It is not the current price of steem, but an average over 3 days. The more steem is worth, the higher is your upvote worth. This is probably the reason why your upvote went under 0.01: steem fell from around $6 to $4. At current price, the amount of total SP needed to have a $0.010 upvote is 30: I calculated that here: https://steemnow.com/upvotecalc.html The rewards are linear, which means that if an X SP upvote is worth $1.00, then an X/100 SP upvote is worth 1 cent; currently, X=3000. Now, a $0.005 upvote will be approximated to $0.01.

-voting power: well apparently you already know about that. Your voting power decreases when you upvote, and replenishes over time. Note that currently with your 15SP, your upvote is worth more than $0.005 at 100% voting power

-reward pool status: there is a limited amount of rewards every day; if everyone started upvoting more, then to accomodate everyone, the value of each individual vote should decrease; on the contrary, should people start dowvoting more, or upvoting less, then the amount of rewards per upvote would increase.

vote weight: under 500 SP, your vote weight is 100% by default, so it not important for you.. yet!

If you don't plan on investing money, consider spending your rewards on steem power: you already have earned 2SBD, each worth around $6 right now.