I tried to install the "Aliens" HTML 5 game onto the Datacoin blockchain, as shown in the very interesting Apertus.io tutorial:  
https://www.youtube.com/watch?v=dCyxrtbD4lI

To my surprise, the cost was 159DTC.  Embii then informed me that this was because Apertus.io could only store data in 20 byte chunks, not 128kB chunks, so the cost was prohibitive.  If they used the 128kB chunks of the getdata/senddata methods other wallets could not execute the programs from the blockchain.

To quote:  
" FYI: Apertus.io also supports Datacoin's variable field storage. it is a lot cheaper method of storing data. one big problem with it... The datacoin wallet does not allow external wallets to access the variable coin data via RPC calls so any DTC-V etchings can only be rebuilt from the wallet that created it. (fee free to experiment with it by enabling the DTC-V coin within your wallet settings...

We hope that the datacoin development team will fix this someday as it would be a great additional storage mechanism.

DTC standard etching behave the same as all other etchings...They are accessible in wallets that did not archive them."  
End quote.

I believe that it is extremely important to be able to execute Javascript programs cheaply from the Datacoin blockchain, and I ask everyone on this forum to please go through the tutorial and try to etch that alien game into the Datacoin blockchain.  Try to see where the problem is and how we can make this work.  I am not in any way connected with the Apertus.io team, but I believe this would be the "killer app" for Datacoin.  I will even send you some Datacoins, but it is actually very easy to mine them yourself with a cheap or old computer because the difficulty is very very low. If Datacoin can execute Javascript programs it would be "Turing complete", like Ethereum.