Have been using their Beta license for years on all my devices, it works great. Just tried to renew the Beta license again a few days ago, but they only issued a licence for one device this time. So I decided to purchase a lifetime license to show some support. Came across this deal, $40 for a lifetime license for up to 9 devices is not too bad.
Adguard Lifetime License Personal (3 Devices) US$18 (A$26.24) / Family (9 Devices) US$27 (A$39.36) @ StackSocial