Hey @smileyrox - you could definitely work with a loyalty program structure like that within Klaviyo.

Segmentation is going to be key in the structure so defining your parameters is going to be huge. 
Let’s say for example:
Tier 1 is = Revenue is $199 or less AND Revenue is at least $50
Tier 2 is = Revenue is $400 or less AND Revenue is at least $200 
Tier 3 is = Revenue is at least $401 

You then could have people weaving in and out of those Tiers based on their total spend with your brand. Your flows could then be trigger based on when they join that segment to then welcome them into that Tier. (Refunds could cause a bit of weirdness here though)

The one thing that is not really going to be clean is if you wanted to do a points based program. You’d need a program for redeeming etc so if you do just a campaign that is like - Hey Tier 3’s here is your exclusive deals for the month, that could definitely work. 

For your Pre-VIP - that could be the segment for people who haven’t hit over $50 bucks or even just people who haven’t ordered yet but making that a flow trigger could be a bit wonky. Might work cleaner as a campaign?

Just brainstorming above but I think it could work if you just want a simple ranking system to then reward your subscribers.

A loyalty points program as part of the Klaviyo function set is what I’d like as well. I agree, the off the shelf Shopify apps are just too expensive to justify.

If there is an existing Klaviyo plugin or beta functionality, I’d definitely be interested in that to be able to award points for purchases from my Shopify store, points that can then be redeemed for coupons or store credit.