So I feel that these free BTC accelerators are just marketing gimmick to sell their paid options or to drive traffic on their sites. Do you agree with this ?
There are too many scams on the internet and if you are not very carful, you will get scammed. I have not used Bitcoin accelerator before because the need have not arise. My friends who have used Bitcoin transaction accelerator service before, said they did it from their wallet apps and I don't know the wallet they were using to store their Bitcoin but I believe that there are some Bitcoin wallet that offers free accelerator service, am not sure but only saying it based on what my friend said.