I figure you’ve seen the PM limits per
Activity block, to get a general idea of how they change as you post:
| Activity | Max recipients | Max recipients if whitelisted | Max PMs per hour | Max PMs per hour if whitelisted | Max PMs per day | Max PMs per day if whitelisted |
| 0 | 2 | 10 | 1 | 40 | 2 | 120 |
| 15 | 3 | 10 | 10 | 40 | 15 | 120 |
| 30 | 5 | 10 | 10 | 40 | 30 | 120 |
| 100 | 7 | 14 | 20 | 80 | 150 | 600 |
| 250 | 15 | 30 | 120 | 120 | 300 | 1200 |
| 500 | 30 | 30 | 120 | 120 | 1200 | 1200 |
You are automatically whitelisted if you buy a
copper membership. You don't need to wear the copper membership, just own it. You can also be whitelisted for free by any staff member and a few non-staff, but we're going to need some reason to think that you actually deserve it. Do not ask me for free whitelisting.
Whitelisting is a not a license to spam. You will be immediately banned if you're found spamming, even if you bought a copper membership (and you will not be refunded).
You could also, as per the above post, ask a staff member to whitelist you, but I don’t recall seeing any such petitions over the past couple of years, at least none that were made public. Nevertheless, the motive needs to be well supported, as the objective of these limits is to avoid people spaming PMs (which, indecently, can lead one to be reported and banned.
There are so many topics on Merits, that it's impossible not to find a bunch simply by browsing or using the forum's search (which may take a little while to master properly). Regardless,
PM limits depend on Activity, not on Merits. 
