I have been running Facebook ads for purchases and I have had decent results but very slowly like 1 sale a day sometimes 2 or 3 but it suddenly slowed down. I tried different campaigns with the winning ad creative but I get nothing and whenever I increase the budget it slows down. However, when I duplicate the ad I get sales and then it just stops. Ctr, link clicks etc are really good and so far in total in the last 4 months I have had around 100 sales but now it’s completely slowed down. Can anyone help or give me some advice?