Just remember that your blocks split every time they stake so you need to keep them in the same wallet address and also when the block size gets to small then just send them to a different address in the same wallet.  No need to send them somewhere and then send them back to yourself.

As for as Sprouts being on Poloniex and Bittrex, I was told that it could happen with no problem.  Someone just needs to take the time to get them to add it.  Hopefully they will take the time before long.  Sprouts is not going to go down in my opinion.  Specially after it gets on more exchanges and has more exposure.  Buy now while it is still pretty cheap.  You can't hardly beat the deal anywhere.  10% in 5 days is great and it compounds as long as your block sizes are large enough.  I mined a good bit of mine but my supply is running low from raining and tipping in the irc channel.  If you want free coins then join the irc channel #sproutcoin.  I don't rain or tip as much as i used to because I can't mine to replenish my supply.  I will be able to start mining again in a week or so though.  I still do rain and tip a good bit.  Specially if you are active in the channel.  I just am using my own stash instead of the dev or whoever providing promo coins to do that with.  Luckily the coin stakes at a high rate or I would not be able to do it at all.  Come to the irc channel and check it out.  I think the addy is irc.freenode.net and the channel is #sproitcoin.  Someone will correct me if the addy is wrong.  Enjoy this coin.  You will not find any like it.