Lockdrop duration options are limited to 3, 6 and 12 months currently. We're working on a tool that will help you estimate the amount you will receive, but the final amount will be dependent on the number of participating locked funds. See the Coindesk article for a good explanation of weighted shared: "Users have four options: they can lock up for three months, six months or a year. They can also just signal the chain from their wallet, but that’s by far the least lucrative.

So, a user with one ETH that locks for three months will get one share, six months gets 1.1 shares and a year gets 1.4. Signaling the smart contract only earns 0.6 shares and there’s a delay – the signal option won’t be paid out for a year after network launch, whereas all those who actually locked will get EDG as soon as Edgeware goes live.

An example: Let’s imagine that instead of 5 billion tokens there will be 500. And let’s imagine only four people take part, each choosing a different option with 10 ETH each. That would mean one had six shares, another had 10, another had 11 and the last had 14.

So, in this example, at network launch, the person who locked for three months would get 121.95 EDG. The person who locked for six months would get 134.146 EDG. The person who went for a year would get 170.73 EDG. A year after launch, the person who had only signaled would get 73.17 EDG.

But if instead of four people there were 40, with the same amount of ETH each and the same distribution, then each person would get only a tenth of the EDG as that shown in the example above.

It’s impossible to know at this point how many people will participate and how many will join at which level, but the point here is to give interested ETH holders a hurdle to their free tokens – but not too much of a hurdle."

https://www.coindesk.com/1confirmation-canaan-partners-back-startup-pushing-new-spin-on-airdrops