Bulk SMS can be an effective way to promote your charity’s merchandise and increase revenue. Here are the steps to follow:

1. Collect phone numbers: First, you need to collect the phone numbers of your supporters who may be interested in purchasing merchandise from your charity. Make sure you have their permission to contact them via SMS.
2. Choose a bulk SMS service: There are several bulk SMS services available online. Choose one that fits your needs and budget.
3. Compose your message: Keep your message brief and to the point. Highlight the benefits of purchasing merchandise from your charity, such as supporting a good cause and receiving a tangible reminder of their support. Provide clear instructions on how supporters can purchase the merchandise.
4. Personalize your message: Address your supporters by their name in the message. This will make them feel more connected to your charity.
5. Include a call-to-action: Include a call-to-action in your message, such as “Purchase our merchandise and support a good cause” or “Get a tangible reminder of your support and make a difference.”
6. Provide a discount or special offer: To encourage supporters to purchase the merchandise, provide a discount or special offer for a limited time.
7. Schedule your message: Choose a date and time when most of your supporters are likely to be available to receive the message.
8. Send the message: Once you have composed and scheduled your message, send it to your supporters.
9. Follow up: Follow up with supporters who have purchased the merchandise. Thank them for their support and encourage them to continue supporting your charity.
   Remember to respect your supporters’ privacy and preferences. If they opt-out of receiving SMS messages, make sure you remove their phone number from your list. Also, avoid sending too many messages as it may lead to supporters feeling overwhelmed and opting-out.