Is a BTC - BCC flippening in the offing?

[grarpamp]

On Fri, Aug 18, 2017 at 1:36 PM, juan <juan.g71 at gmail.com> wrote:
>         bch isn't the first bitcoin clone out there, you know...(or
>         maybe you don't?)

There are lots of forked code "clones" of BTC the *software*,
with their own new genesis blocks and empty blockchains,
thus starting their mining at their own new block 1.

However, can you list any or all other coins that actually copied
and started their mining operations using any block level of
the preexisting BTC *blockchain* and genesis block???



An unrelated side project is to list all the coins / services that
ride their functions on top of the existing BTC blockchain
via embedding comments in BTC transactions.
They could be said to be of overlay type since they necessarily
run the BTC blockchain in parallel, for which forking it is moot,
"2 for 1" does not happen there either, and if BTC tx dies they die,
or necessarily become a two chain mining operation.