I would love to try your service if in case, soccer and basketball will be availabe in your service. As of now I will be looking forward to hear some of the response from the members here who availed your service so I can check whether it is worth paying your service.
Without having tested this service, I would think it's not worth it. And OP basically gave the answer as to why already himself:
5 seconds is enough to stake a bet on a good not limited account. I.e on. B365 it's depends on tournament, (...)
I doubt that you really get that big of a time advantage with this offered service, but lets assume you actually do. There are some issues then:
1) You can't stake a lot in table tennis. On ML a bit more, but these side markets have low limits and it will take you quite some time to make up the buying costs of what OP offers. And you might not even get there, because.....
2) Your account will get limited lightning fast, if you are regularly doing very good in niche markets. In worst case scenario....
3) Your funds will get frozen, because of suspicious betting activities. If you own these markets and can't seem to do wrong, then your account will get flagged and investigated. Good luck in getting your account unlocked and your funds/profits back then.
4) For these kind of exploits there are normally small time windows, where you can execute, until the bookie puts up some extra measures to prevent getting exploited.
5) OP probably tried this as well and is now a) running out of "good and not limited accounts" or b) it's not working anymore, so you just sell the service. I think it's b), because if you have a money-printing machine, you don't sell it. Getting Bet365 accounts is not that hard and you can just offer 50/50 profit split for interested persons.
For bigger sports you don't even need to think about buying such service, because there are spotters around everywhere in the grounds/arenas/stadiums and you can't beat what is happening right now in front your eyes, no matter how hard you try
If you watch football streams on Bet365, you will notice, that the stream you are watching is lagging behind the odds. Bet365 themselves don't rely on their own stream, they get their information (goals, cards, penalties, dangerous situations) directly from their spotters.