So its another coin in a way, what happens with BOOM now and why is needed

In short, Boom is a longer term project, and HASH will eventually be destroyed by cleverhash when people use it to buy a miner, and the funding raised by HASH and some of the revenue of the company will be used to hire world-class programmers to work on the Boomcoin project.
Further more, think about buying miners using Boom, you not only get 5%, but also, the higher the market price, the fewer Booms you will be paying, so when large buyers like some big Businesses or Business partners of cleverhash prepare to buy some miners, they will be pushing the market price higher to actually get a discount that is actually more than 5%.
Got it now, just finished reading the whitepaper so this is most interesting for me for noW

Customers who pay in Boomcoin (BOOM) during the public sale of our mining hardware will receive a 5%
discount. Customers worldwide will save money by acquiring Boomcoins for their ASIC purchases, and
put Boomcoin into the spotlight!
Since Boomcoin is a Cleverhash family token, we are excited to announce these unique benefits to the
Boomcoin community.
5% Savings when customers pay with Boomcoin!
o This adds up to HUGE Savings long‐term for customers worldwide!
o Demand will increase for Boom and increase exchange volume!
5,000 HASH tokens will be proportionally distributed to the Boomcoin Community! For FREE!
Appropriate funding for Boomcoin innovations.
HASH & BOOM! Multi‐wallet integration!
Boomcoins will be a payment method alongside HASH for the decentralized Cloud mining
platform!