I think black magic is the smartest one not to sell because you had devuetils out at the time but like that one as you said you didn't charge a monthly subscription people will just buy that off the map app store download it once pay for it once and that's it. I use Twitter a lot and I have an audience building an audience on Twitter and the product is also about Twitter so there's a fit of the audience and the customers so that's why I was able to grow the product without doing any other type of marketing I tried but it was not a succeed I try I paid ads and and and blocks and stuff but in the end I think it's not sustainable for