The mining process remains untouched therefore, this doesn't affect the share submission for Altcoin miner. Miners will still be finding valid solutions for the altcoin chain.
Catalyst doesn't change profitability or mining difficulty. Only affects the currency payments are made.
Is there any reason to use your service since we can mine altcoins and convert into bitcoin on the exchanges right?
And also mention about the prices to convert mined coins into bitcoin.
If there is no fee then this may worth try since it can reduce the expenses of trading fee and withdrawal fee from an exchange.