can't speak to the legality question and mithril is being courted by Tristan D' agosta of the Poloniex Exchange http://imgur.com/a/vNfWy i think we are going to pass though. 

we like both YoBit and Nova and have plans to reach out when we hit some internal commitment goals.

understand your frustration with the ambiguous block times here is the main.cpp values for target time span:

static const int64 nTargetTimespan = 2 * 60;                               //look at the last 2 minutes
static const int64 nTargetSpacing = 1 * 60;                                // 60 seconds per block
static const int64 nInterval = nTargetTimespan / nTargetSpacing; //change every 120/60 2 blocks

we experience the same thing 2 - 7 minute block time on average with 10 - 40 second successive blocks and then the difficulty spikes. So technically the code is working as designed an unexpected result is lower:
nTargetTimespan = 120    nActualTimespan = 30
or
nTargetTimespan = 120    nActualTimespan = 306
a lot higher.

a possible remedy would be to increase the target spacing and target timespan to allow for a more consistent target and we'll be reviewing transaction data prior to making any changes.

glad you asked. several mith has been allocated for dev bounties and a bounty hunter menu has been placed on https://mithrilda.org/
keep in mind that the + next to the reward is the minimum and we expect serious dev bounty hunter to name their price.

the source has been released on github:

https://github.com/mithrilda/mithril

 some miscommunication on our part. well be happy to forward an additional bounty to your wallet, MWk74HP1WT7hSXvb6DxE9KmBL551bYVYTd in another 1283 blocks.

mithril is an experimental asset similar to other SHA256 instruments. mith is a proof of work (PoW) type alternative currency with the following characteristics:
total mith supply is 125,000,000 that includes a 20% premine
the block reward is 100 coins and block halving occurs at 500000 blocks
RPC port 18026
P2P port 18025
coinbase maturity is 1440 blocks
target spacing 1 minute with a target time span of 2 minutes
transaction confirmations are set at 6 blocks

wallets, source, etc can be found on github https://github.com/mithrilda/mithril

we have found the following .conf file to work:
rpcuser=rpc_mithril
rpcpassword=mithrilIsAwesome
rpcallowip=127.0.0.1
rpcport=18026
listen=1
server=1
addnode=45.76.29.190

node.mithrilda.org will be online within the next 48 hours

mithril bounties are available for wallet creation, blockchain explorer, basically anything valuable that benefits the growth of mithril.

the idea behind mithril is simple. we are raising interest in alternative asset acquisition by speaking with our friends, neighbors, people that we spend time with.

so begins the long game

https://mithrilda.org/
info@mithrilda.org


5.20.17 21:32:22 CST

{
"version" : 1000000,
"protocolversion" : 70001,
"walletversion" : 60000,
"balance" : 0.00000000,
"blocks" : 37,
"timeoffset" : 0,
"connections" : 2,
"proxy" : "",
"difficulty" : 6.77164757,
"testnet" : false,
"keypoololdest" : 1495299963,
"keypoolsize" : 103,
"paytxfee" : 0.00000000,
"errors" : ""
}