For those interested in Roamless, I finally registered today due to a Black Friday promo. They're still not likely to be the best rate compared to a local eSIM carrier if you're planning heavy usage in a standard timeframe (like 7 days).
However, I think they shine in either low-medium usage or longer timeframes or a lot of travel between countries.

As someone who always buys bigger GB plans and then ends up not using it all so the extra GB expires, the non-expiring validity Roamless has is a big bonus for me.

The Black Friday promo is pretty simple (new users only) - Load $20, get total of $40 in credit:
1. $1.25 free for registering (this is standard)
2. Black Friday special: $10 bonus credit for putting in a referral code before you load money for the 1st time (must load minimum $10) - normally this is a $3 bonus. This DOES stack with the below coupon.
3. Additional $3.75 free for adding a coupon code, such as 5DOLLARS. Their coupons do not stack with other coupons, they do stack with referral though. In all my searching and contacting CS, there is no better coupon than the $3.75 (which they call $5 because of the $1.25 you already get). You don't need to load money to get this.
4. Additional $5 bonus if you load $20+.

So to get maximum benefit, you sign up, put in referral code in the promo code area, then put in 5DOLLARS in the promo code area, and then load $20, and you'll end up with $40 in credit ($20 of which was free).
Alternatively, if you load $0, you'll have $5 total free credit. If you load only $10, you'll have $25 total credit ($15 of which was free).

I'm not sure if putting my referral code directly here is allowed but you can PM me or anyone else in this thread who mentioned they use Roamless and I'm sure we'd all appreciate and send you our codes.