I've been searching for a push notification for a long time and most deals that came out had either low limits, low sites or both. Some were not fully developed during the sale and continued as such long after the sale was over.

Having bought tons of lifetime deals since 2011, Gravitec stood out with the following
a) its high traffic (21.9k on ahrefs)
b) list of established brands using Gravitec
c) generous limits

I've tested Gravitec on my sites and the push notification works well. Here's goodbye to izooto! :p
On a more serious note, I'm still testing out Gravitec and I'm waiting for some answers to a few questions. However, if you're on the fence, grab this deal before it ends!