I intend to officially support that coin for internal transactions on my websites network and to offer the possibility for my clients to buy real products and real services with this coin.
i don't understand what you mean by "internal transactions". can you explain?
but for the other part, to use a cryptocurrency so that your clients can buy products you need to choose a cryptocurrency that:
1. has a large number of users, meaning many people know it, own it, trust it, and most importantly are willing to spend it.
2. a coin that has a secure network. this consists of the security of the code itself (without bugs), hash rate (so it can not be open to attacks), enough nodes (to ensure security of the network and also decentralization of it).
i am afraid your choices are very limited. for now the best thing you can find is bitcoin, but the fees are high so many may not be willing to spend it as a currency.
other options are Litecoin and Dogecoin but they are far less known, so little number of people own them or are willing to spend them because they invested in these coins and want profit not to use as a currency.
I also fell like i have to make things more clear. In first stages i don't care about selling everything using the coin. I intend to buy (random example) 1.000.000 coins and give them free to my users. Like a rebate to my services. Allow them to buy real services with that coin or if they own the coin itself the lucky ones to have access to same rebates. For example i intend to make a rebate like this: Original price 100$ - or 50$ + the other half in coins.
giveaways are never going to end well.
people will come, claim the giveaway, abuse it, and go away and never come back.
as i said they have to already have that coin and also be willing to spend it. it is a bit of a tricky situation.